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Soni-kay

  • 3 years ago

(-8-i)(-1-5i)

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  1. SmoothMath
    • 3 years ago
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    Foil \[i^2 = (-1)\] group like terms

  2. lgbasallote
    • 3 years ago
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    you know how to FOIL right?

  3. Soni-kay
    • 3 years ago
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    yea i got it

  4. lgbasallote
    • 3 years ago
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    you should give a medal to the person who helped you so he'll know you got it ;D

  5. radar
    • 3 years ago
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    If you don't like FOIL you might want to try to multiply the "ole fashion way" -8 -i -1-5i --------------- 8+i +40i +5i^2 ------------- 8 +41i-5 Consolidating: 3+41i

  6. SmoothMath
    • 3 years ago
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    Oh, I like that, Radar. Never actually seen that.

  7. radar
    • 3 years ago
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    Same thing as foil, but in a way you can see it.

  8. radar
    • 3 years ago
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    Being 73 yrs old, that was the way I first saw it, but now most do it mentally using foil.

  9. SmoothMath
    • 3 years ago
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    Oh my. Old guy is tech savvy. =D

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