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anonymous

  • one year ago

Write -2i + (9 − 3i) − (6 − 10i) as a complex number in standard form. 3 − 5i 3 + 5i 3 + 16i 12 − 16i

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  1. anonymous
    • one year ago
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    can you help @Nnesha and @sohailiftikhar

  2. Nnesha
    • one year ago
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    first of all distribute 2nd parentheses by negative one

  3. Nnesha
    • one year ago
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    |dw:1438709754483:dw| -1(6-10i) distribute

  4. anonymous
    • one year ago
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    -6+10i

  5. sohailiftikhar
    • one year ago
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    it's 3+5i

  6. Nnesha
    • one year ago
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    yep right now combine *like terms \[\huge\rm -2i+9-3i -6+10i\]

  7. anonymous
    • one year ago
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    but if i was to distribute to the first part both numbers would be imaginary

  8. anonymous
    • one year ago
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    3+5i

  9. Nnesha
    • one year ago
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    do you mean first parentheses ?

  10. anonymous
    • one year ago
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    yeah

  11. Nnesha
    • one year ago
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    there is a plus sign so you don't have to distribute just remove the parentheses

  12. sohailiftikhar
    • one year ago
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    \[-2i-3i+10i+9-6=3i+5\]

  13. sohailiftikhar
    • one year ago
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    you just have to add or subtract like numbers only

  14. anonymous
    • one year ago
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    |dw:1438709987964:dw| was how they showed me

  15. anonymous
    • one year ago
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    that was the example they gave me

  16. anonymous
    • one year ago
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    can you help with this problem as well? Write (21 − 4i) − (16 + 7i) + 28i as a complex number in standard form. 5 + 39i 5 + 17i 5 − 39i 5 − 17i

  17. Nnesha
    • one year ago
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    yep they shows what are like terms 3i and 5i are like terms so combine them add their coefficient (3+5)i = 8i

  18. sohailiftikhar
    • one year ago
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    ok Nnesha you here

  19. Nnesha
    • one year ago
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    same like last one so what would be the first step ?

  20. anonymous
    • one year ago
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    okay so this one i would combine right ?

  21. Nnesha
    • one year ago
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    nope that's 2nd step

  22. Nnesha
    • one year ago
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    \[ \huge\rm (21 − 4i) \color{ReD}{−} (16 + 7i) + 28i \] there is a negative sign so.?

  23. sohailiftikhar
    • one year ago
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    lol it's not a level of child Nnesha

  24. Nnesha
    • one year ago
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    what do you mean by that ?

  25. anonymous
    • one year ago
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    i would add a 1?

  26. sohailiftikhar
    • one year ago
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    just combine the terms and get answer what is that mean by 1st step and 2nd ?

  27. Nnesha
    • one year ago
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    there are steps to solve any math questions

  28. sohailiftikhar
    • one year ago
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    yes but we have to see where we need then or where we can directly

  29. Nnesha
    • one year ago
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    1st step) distribute parentheses by -1 2nd) combine like terms how would you combine them first without applying distributive property ?

  30. anonymous
    • one year ago
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    21- 16 would be 5 and it would be subtraction after that right ?

  31. sohailiftikhar
    • one year ago
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    so if you have given with a lengthy Question and then you will still use every basic step huh ?

  32. Nnesha
    • one year ago
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    \(\color{blue}{\text{Originally Posted by}}\) @sohailiftikhar just combine the terms and get answer what is that mean by 1st step and 2nd ? \(\color{blue}{\text{End of Quote}}\) first distribute parentheses

  33. Nnesha
    • one year ago
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    if you start with combining like terms you would get wrong answer

  34. sohailiftikhar
    • one year ago
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    what if you are solving multiple choices and you have short time to do them huh ?

  35. anonymous
    • one year ago
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    the last part would be 17 but is it negative ?

  36. Nnesha
    • one year ago
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    you can't get wright answer without doing first step.

  37. sohailiftikhar
    • one year ago
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    not for this Question

  38. Nnesha
    • one year ago
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    right*

  39. Nnesha
    • one year ago
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    at this point we should focus on this question.

  40. anonymous
    • one year ago
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    agreed ^

  41. anonymous
    • one year ago
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    so it would be 5+17I right?

  42. sohailiftikhar
    • one year ago
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    yes so it can solve by just adding terms

  43. sohailiftikhar
    • one year ago
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    ok don't mind this bye

  44. anonymous
    • one year ago
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    thanks again guys you've been a really big help!!!

  45. sohailiftikhar
    • one year ago
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    no problem buddy

  46. Nnesha
    • one year ago
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    \(\color{blue}{\text{Originally Posted by}}\) @sohailiftikhar yes so it can solve by just adding terms \(\color{blue}{\text{End of Quote}}\) again first we have to distribute the parentheses

  47. sohailiftikhar
    • one year ago
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    yes but we done this in our mind not on page because it's simple in this case

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