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KE8717504

  • 3 years ago

what are 2 binomials whose product is x^2-25?? please help

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  1. AnimalAin
    • 3 years ago
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    Difference of squares. \[a^2-b^2=(a+b)(a-b) \]

  2. KE8717504
    • 3 years ago
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    Ok so what would that make the binomials?

  3. KE8717504
    • 3 years ago
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    I just hate binomials i can't ever get them.

  4. lgbasallote
    • 3 years ago
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    a+ b <---first binomial a - b<---second binomial just substitue a and b to the right values

  5. KE8717504
    • 3 years ago
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    Yes that's what I am having trouble finding though. Because the question states write 2 binomials whose product is x squared - 25

  6. KE8717504
    • 3 years ago
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    I have no clue, i know that sounds stupid

  7. KE8717504
    • 3 years ago
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    I just hate doing math anyways so it's confusing to me even when i do binomials.

  8. lgbasallote
    • 3 years ago
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    okay here's a hint \[a^2 - b^2 \implies (a+b)(a-b)\] so \[x^2 - 4 \implies (x + 2)(x-2)\] \[x^2 - 9 \implies (x+3)(x-3)\] \[x^2 - 16 \implies (x+4)(x-4)\] are you getting it now?

  9. KE8717504
    • 3 years ago
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    so a bionomial for x squared -25 could be (x+5)?

  10. lgbasallote
    • 3 years ago
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    yes that's one of the binomials...what's the other?

  11. KE8717504
    • 3 years ago
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    would it be (x-5)?

  12. lgbasallote
    • 3 years ago
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    yes. the binomials for x^2 - 25 is (x+5)(x-5) congrats

  13. KE8717504
    • 3 years ago
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    well see when i typed that in my program on my computer i have to do this math on it said it was incorrect

  14. lgbasallote
    • 3 years ago
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    that's why i hate those computers lol. so picky

  15. lgbasallote
    • 3 years ago
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    try putting them in one by one

  16. KE8717504
    • 3 years ago
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    i did i tried the x + 5 first

  17. lgbasallote
    • 3 years ago
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    shouldnt make a difference but...try putting x-5 first?

  18. KE8717504
    • 3 years ago
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    Should I put the ( ) or not?

  19. KE8717504
    • 3 years ago
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    and it says type your answer in factor form so what would that be

  20. lgbasallote
    • 3 years ago
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    (x+5)(x-5)

  21. lgbasallote
    • 3 years ago
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    ^factor form

  22. KE8717504
    • 3 years ago
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    so the (x+5)(x-5) is factor form?

  23. lgbasallote
    • 3 years ago
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    yes (x+5)(x-5) is factor form...

  24. KE8717504
    • 3 years ago
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    can i ask you another math question

  25. lgbasallote
    • 3 years ago
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    sure

  26. KE8717504
    • 3 years ago
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    The number of ways a teacher can award different prizes to 2 students in class having n students is given by the formula p(n)=n(n-1)

  27. KE8717504
    • 3 years ago
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    use this formula to determeine the number of ways a teacher can award different prizes to 2 students in a class having 6 students

  28. lgbasallote
    • 3 years ago
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    substitute 6 into n in the formula

  29. KE8717504
    • 3 years ago
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    then it says to rewrite the formula by multiplying the factors

  30. lgbasallote
    • 3 years ago
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    yes. substitute 6 into n in the formula...

  31. KE8717504
    • 3 years ago
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    ok so the formula would be P(6)=6(6-1)?

  32. lgbasallote
    • 3 years ago
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    yes

  33. KE8717504
    • 3 years ago
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    just a couple more questions i promise

  34. KE8717504
    • 3 years ago
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    when i tried typing that the other way it said multiply the two factors of the expression for p(n) given in the problem statement to write the expression in a different way

  35. lgbasallote
    • 3 years ago
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    i dont get what you're asking

  36. KE8717504
    • 3 years ago
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    It's just saying to rewrite the formula in a different way

  37. KE8717504
    • 3 years ago
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    by multiplying the factors

  38. lgbasallote
    • 3 years ago
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    just substitute 6 into n...isnt that what you did?

  39. KE8717504
    • 3 years ago
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    Yea i did that for the first answer but it's not right for the second one

  40. lgbasallote
    • 3 years ago
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    now multiply

  41. lgbasallote
    • 3 years ago
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    simplify it

  42. KE8717504
    • 3 years ago
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    so the answer would be 30 right that simplified

  43. KE8717504
    • 3 years ago
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    but that's not the formula

  44. KE8717504
    • 3 years ago
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    can i give u my math xl login info and let you look at it?

  45. lgbasallote
    • 3 years ago
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    the formula is what you wrote first

  46. lgbasallote
    • 3 years ago
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    the simplified is the second answer

  47. KE8717504
    • 3 years ago
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    So the first formula was p(n)=n(n-1) then it was P(6)=6(6-1) then it was P(6)=6(5) and then P(6)=30

  48. lgbasallote
    • 3 years ago
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    yes

  49. KE8717504
    • 3 years ago
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    But when it said to multiply factors and write the formula over I have no idea

  50. lgbasallote
    • 3 years ago
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    multiply the factors means you multiply the factors <--that will give you 30 write the formula over is just copying the formula but substitute 6

  51. KE8717504
    • 3 years ago
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    ok so my answer box already has P(N)= so i need to put 6 X 5

  52. lgbasallote
    • 3 years ago
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    if the start is p(n) = then you rewrite the formula... n(n-1)

  53. KE8717504
    • 3 years ago
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    omg it said it wasn't in correct form that time but it was correct

  54. lgbasallote
    • 3 years ago
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    lol. these computers are confusing me now o.O

  55. KE8717504
    • 3 years ago
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    I know right I don't know how to put it

  56. lgbasallote
    • 3 years ago
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    me neither.

  57. lgbasallote
    • 3 years ago
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    sorry kid. cant help you with your computer problems.

  58. lgbasallote
    • 3 years ago
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    i have to go now so i wish you luck that you finish this

  59. KE8717504
    • 3 years ago
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    thanks soooo much for your help

  60. lgbasallote
    • 3 years ago
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    welcome

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