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anonymous

  • 5 years ago

squrt(-a)*squrt(-b) is equal to squrt (-a)(-b) or not ?

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  1. anonymous
    • 5 years ago
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    not it isn't. it is equal to -sqrt(-a)(-b)

  2. anonymous
    • 5 years ago
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    no it is equal to -1*squrt(a)(b)

  3. anonymous
    • 5 years ago
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    yes, that is the same as what I wrote. (-a)(-b)=(a)(b)

  4. anonymous
    • 5 years ago
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    i think we cant not multiply two numbers which are negative inside the sqrt...thats what the logic, i guess...what do u say ?

  5. anonymous
    • 5 years ago
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    you can do all the arithmetic functions within the square roots. sqrt(20) = sqrt((4)(5))

  6. anonymous
    • 5 years ago
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    sqrt(9) = sqrt(5+4)

  7. anonymous
    • 5 years ago
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    sqrt(9) is NOT equal to sqrt(4)+sqrt(5)

  8. anonymous
    • 5 years ago
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    what u told ll apply for positive numbers..not for negatives...otherwise the question what i posted would have a direct answer

  9. anonymous
    • 5 years ago
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    hey actually i saw this, when iam reading abt complex numbers

  10. anonymous
    • 5 years ago
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    yes, sqrt of a negative number is imaginary. so when you multiply an imaginary number with another imaginary number you get negative(their product) whereas if sqrt(-5)(-4) is given, it means you first multiply what is within the sqrt and THEN calculate the square root. It is kind of an extension of the BODMAS rule.

  11. anonymous
    • 5 years ago
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    if is so...then y sqrt(-a)*sqrt(-b) is not equal to sqrt(-a)(-b)....

  12. anonymous
    • 5 years ago
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    because you evaluate what is within the square root and then take its square root so sqrt(-a) X sqrt(-b) = i sqrt(a) X i sqrt(b) = i^2sqrt(ab)= -sqrt(ab)

  13. anonymous
    • 5 years ago
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    sqrt(number) is also a number. you must treat sqrt(number) as a number.

  14. anonymous
    • 5 years ago
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    sqrt(4) must be treated the same way you treat 2. so sqrt (4) X sqrt(4) means you are multiplying two separate numbers.

  15. anonymous
    • 5 years ago
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    you first evaluate the sqrt(4) and THEN do the multiplication. so sqrt(4) X sqrt(4) = 2 X 2 = 4.

  16. anonymous
    • 5 years ago
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    iam clear upto the part...that...sqrt(-a)*sqrt(-b) is equal to -1*sqrt(a)*sqrt(b)....am i right ?

  17. anonymous
    • 5 years ago
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    so sqrt(-a) X sqrt(-b) means you are taking the number sqrt(-a) and multiplying it by the number sqrt(-b). sqrt(-a) is the number i sqrt(a). sqrt(-b) is the number i sqrt(b). so when you multiply these two numbers you get i^2 sqrt(a)sqrt(b) = -1sqrt(ab)

  18. anonymous
    • 5 years ago
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    whereas when you are evaluating sqrt(-a X -b), you treat this as a number too, it is the number sqrt(-a X -b) = sqrt( ab)

  19. anonymous
    • 5 years ago
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    yes exactly ur right...i agree with u completely..infact thats what i was saying u right ?

  20. anonymous
    • 5 years ago
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    no, you were saying that you cannot perform multiplication within square roots, which you can.

  21. anonymous
    • 5 years ago
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    wait wait...

  22. anonymous
    • 5 years ago
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    if those two r individually correct, then y iam not able to write LHS=RHS, assuming LHS = sqrt(-a)*sqrt(-b), RHS=sqrt(-a)*(-b)....

  23. anonymous
    • 5 years ago
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    I think agian v cam to first...

  24. anonymous
    • 5 years ago
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    because LHS and RHS have two different meanings. LHS means you are taking the number sqrt(-a) and multiplying it with the number sqrt(-b) RHS means you are evaluating the number sqrt(-a X -b) which is the same as the number sqrt(ab)

  25. anonymous
    • 5 years ago
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    then what abt "-" sign...so u mean to say -sqrt(a*b) is equal to sqrt(-a*-b) ?

  26. anonymous
    • 5 years ago
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    sqrt (a) means square root of the number a. sqrt(-a) means the square root of the number -a. sqrt(-a X -b) means square root of the number (-a x -b) which is the same as square root of the number ab.

  27. anonymous
    • 5 years ago
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    hey i think i did typing mistake , while writing parentheses....but i understood ur concept....u r right...i conveyed u a wrong message without including brackets....hope so...but iam clear how "-" has come...

  28. anonymous
    • 5 years ago
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    so you have to first evaluate what number it is you are taking the square root of, and then square root it.

  29. anonymous
    • 5 years ago
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    r u a math student ?....where r u from ?

  30. anonymous
    • 5 years ago
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    google sqrt(-1*-4) and see what the answer is google sqrt(-1) * sqrt(-4) and see what the answer is.

  31. anonymous
    • 5 years ago
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    do it now and you will see what I am talking about.

  32. anonymous
    • 5 years ago
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    ok i ll do it..

  33. anonymous
    • 5 years ago
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    just copy and paste what I typed there into google and press enter. google has a built in calculator

  34. anonymous
    • 5 years ago
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    no, i'm not a math student. I am from India.

  35. anonymous
    • 5 years ago
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    answer is 2, -2

  36. anonymous
    • 5 years ago
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    for ur 2 equations

  37. anonymous
    • 5 years ago
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    see what I meant? in the first case, the product of (-1 * -4) was done first and then the square root was applied to that number. (-1*-4) = 4. so sqrt(4) = 2 in the second case, sqrt(-1)*sqrt(-4), the square roots were evaluated first, which is i and 2i and THEN they were multiplied. which means i*2i = 2i^2 = -2.

  38. anonymous
    • 5 years ago
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    ya i got it..

  39. anonymous
    • 5 years ago
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    okay great. cheers!

  40. anonymous
    • 5 years ago
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    r u an engineering student ? ....math is ur favorite subject ?

  41. anonymous
    • 5 years ago
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    I am not a student. I finished graduation last year. Physics is my favorite subject. I just come here to help out sometimes.

  42. anonymous
    • 5 years ago
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    what about you?

  43. anonymous
    • 5 years ago
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    ok ...i finished my under graduation in Mechanical engineerign from Hyderabad...presently working in a company, chennai....going to do my MS in Industrial Engineering in US...by this july end iam gonna fly...thats y iam just revising my basics before my classes ll start...Maths is hobby..

  44. anonymous
    • 5 years ago
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    oh okay. which university?

  45. anonymous
    • 5 years ago
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    JNTU,Kukatpally...do u know it ?

  46. anonymous
    • 5 years ago
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    oh yes. I know that university. One of my friend's sister studied there. but i meant which university are gonna do IE in US?

  47. anonymous
    • 5 years ago
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    okay...North Carolina State University (NCSU), Raleigh....do u know abt it ?

  48. anonymous
    • 5 years ago
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    Oh NCSU, I see. Good, that is a nice university. One of my friends graduated from there. Pack warm clothes. It is pretty cold in NC.

  49. anonymous
    • 5 years ago
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    ya its a good university....i love the ambiance there...it ll give u a blend of all the weathers....u can really enjoy...Btw...May-18th is my VISA ...bit nervous..

  50. anonymous
    • 5 years ago
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    oh, don't be nervous. It was easy for me. Just don't stammer and show nervousness when the guy asks you anything. takes 5 minutes max. where are going for VISA? chennai consulate?

  51. anonymous
    • 5 years ago
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    ya Chennai Consulate..

  52. anonymous
    • 5 years ago
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    actually, I just saw the temperatures. not so bad. 32 F is not that bad. It gets that cold here out in the west sometimes.

  53. anonymous
    • 5 years ago
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    okay, well all the best.

  54. anonymous
    • 5 years ago
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    from which university did u graduated ?

  55. anonymous
    • 5 years ago
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    USC

  56. anonymous
    • 5 years ago
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    ok so ur in Cali now ?

  57. anonymous
    • 5 years ago
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    yeah. I live in Orange County.

  58. anonymous
    • 5 years ago
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    ohh cool

  59. anonymous
    • 5 years ago
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    actually, I have to move to san francisco by next month.

  60. anonymous
    • 5 years ago
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    y so ?..r u working ?

  61. anonymous
    • 5 years ago
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    yes. As I said, I graduated last year.

  62. anonymous
    • 5 years ago
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    okkkk

  63. anonymous
    • 5 years ago
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    which branch r u ?...whats ur major ?

  64. anonymous
    • 5 years ago
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    I did computer engineering. did thesis on wireless networking.

  65. anonymous
    • 5 years ago
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    ok

  66. anonymous
    • 5 years ago
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    basically r u a telugu guy ?

  67. anonymous
    • 5 years ago
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    yes.

  68. anonymous
    • 5 years ago
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    ok

  69. anonymous
    • 5 years ago
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    But I haven't lived in Andhra for more than 2 years.

  70. anonymous
    • 5 years ago
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    ohhh...where u used to stay ? atleast do u know telugu r not ?

  71. anonymous
    • 5 years ago
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    I used to stay in rajamundry for less than 2 years. but I have lived most of my life in Dehradun and chennai, and now LA. and yes, we speak telugu at home.

  72. anonymous
    • 5 years ago
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    I speak telugu, tamil and hindi fluently.

  73. anonymous
    • 5 years ago
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    ur not sleeping by this time ?

  74. anonymous
    • 5 years ago
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    what about you? how long have you stayed in hyderabad?

  75. anonymous
    • 5 years ago
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    I slept in the night for a bit. I can't sleep more, so I decided to stay up and go to office directly tomorrow.

  76. anonymous
    • 5 years ago
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    i was in HYD for 7 years...in Chennai for 1 year....i know telugu,tamil,english,hindi....little bit kanada

  77. anonymous
    • 5 years ago
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    oh good. that will come in handy here. everyone assumes you know hindi.

  78. anonymous
    • 5 years ago
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    alright, it was nice chatting with you. I'm gonna go make some food and have a couple of smokes. its a beautiful night here. All the best for your visa interview! Don't be nervous about it. I'm sure you will get it.

  79. anonymous
    • 5 years ago
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    hey really thanks...whats ur name ?...dont scold me as iam asking at last ...

  80. anonymous
    • 5 years ago
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    I'm aditya. and i already know yours.

  81. anonymous
    • 5 years ago
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    thanks...

  82. anonymous
    • 5 years ago
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    bye now.

  83. anonymous
    • 5 years ago
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    hey bye bye...

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