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anonymous

  • one year ago

(−3 + 2i) • (2 + i)

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  1. anonymous
    • one year ago
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    Do you know foil?

  2. anonymous
    • one year ago
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    yeah kinda i guess

  3. anonymous
    • one year ago
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    that's really all this is. and then when you multiply i * i, it's -1

  4. anonymous
    • one year ago
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    ohh okay thank you

  5. anonymous
    • one year ago
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    no problem. tag me if you need more help or want to get your answer checked

  6. anonymous
    • one year ago
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    okay imma solve it now

  7. anonymous
    • one year ago
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    o would be -3i?

  8. anonymous
    • one year ago
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    no. what did you get when you multiplied, before you combined?

  9. anonymous
    • one year ago
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    huh

  10. anonymous
    • one year ago
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    what did you get from foil?

  11. anonymous
    • one year ago
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    im asking abou the o the f is 6 but i dont know the rest

  12. anonymous
    • one year ago
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    oh, ok. Sorry, I thought you were saying that the final answer was -3i. That's right for O. F is -6.

  13. anonymous
    • one year ago
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    okay and i is 4i?

  14. anonymous
    • one year ago
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    yes

  15. anonymous
    • one year ago
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    what would L be??

  16. anonymous
    • one year ago
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    \[2i \times i = 2i^2 = 2(-1) = -2\]

  17. anonymous
    • one year ago
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    so when you add them all up you have \[-6-3i+4i-2\] and you just have to combine like terms

  18. anonymous
    • one year ago
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    so the answer is -7?

  19. anonymous
    • one year ago
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    combine the i's and combine the constants. Don't mix them (-3i + 4i) + (-6 - 2) i - 8 is your answer

  20. anonymous
    • one year ago
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    or rather -8 + i is the order it's usually written in

  21. anonymous
    • one year ago
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    okay thank you

  22. anonymous
    • one year ago
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    you're welcome

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spraguer (Moderator)
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