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anonymous

  • one year ago

find real numbers a and b such that the equation is true (a-1)+(b+3)i=5+8i

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  1. sidmanfu
    • one year ago
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    In equations like this you can always separate real and imaginary numbers into separate equations. So, hypothetically if you had x+yi = 4 - 3i you could separate the equation to x=4 and yi= -3i, so x=4 and y= -3 Now back to your question: First you multiply things out (this isn't that important for the above question, but could be if you had to keep track of multiplying i's together i.e. x + (y+zi)*(i+3) = 8. I won't solve it, but you would have to "FOIL" that last part.) so... back to your question again. multiplying stuff out... a - 1 + b*i +3*i = 5 + 8*i separate into separate equations for real and imaginary (as shown at top) a - 1 = 5 b*i + 3*i = 8*i now solve using basic algebra to get... a = 6 b*i = 5*i, therefore b=5

  2. anonymous
    • one year ago
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    No direct answers, please.

  3. sidmanfu
    • one year ago
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    I hope I helped enough @Patsfan12 :)

  4. anonymous
    • one year ago
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    thanks! your explanation was very thorough :)

  5. sidmanfu
    • one year ago
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    no problem! ask me any questions u help with ;)

  6. anonymous
    • one year ago
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    i will don't worry XD

  7. sidmanfu
    • one year ago
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    lol

  8. sidmanfu
    • one year ago
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    and please fan me

  9. anonymous
    • one year ago
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    I thought I did?

  10. anonymous
    • one year ago
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    yes I am :)

  11. sidmanfu
    • one year ago
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    ok thanks :P

  12. anonymous
    • one year ago
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    Ok @sidmanfu the instructions are to perform the operation and write the result in standard form: sqrt(-6) x sqrt(-2)

  13. triciaal
    • one year ago
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    |dw:1443486406539:dw|

  14. triciaal
    • one year ago
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    |dw:1443486540660:dw|

  15. anonymous
    • one year ago
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    (1+i)(3-2i)

  16. anonymous
    • one year ago
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    @sidmanfu

  17. sidmanfu
    • one year ago
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    yes?

  18. anonymous
    • one year ago
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    help on that last one i posted?

  19. anonymous
    • one year ago
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    (1+i)(3-2i)

  20. sidmanfu
    • one year ago
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    ok

  21. anonymous
    • one year ago
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    never mind I got it

  22. sidmanfu
    • one year ago
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    oh ok lol :)

  23. sidmanfu
    • one year ago
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    any other questions u want me to help u with?

  24. anonymous
    • one year ago
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    I will let you know ;)

  25. sidmanfu
    • one year ago
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    ok and did u add me on snapchat too?

  26. anonymous
    • one year ago
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    sure

  27. sidmanfu
    • one year ago
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    do u still need help?

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