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OpenStudy (gabylovesyou):
@ganeshie8 (5 - 4i)(3 + 3i)
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OpenStudy (trojanpoem):
Normal multiplication
OpenStudy (trojanpoem):
i * i = i^2 which is rootof(-1) ^2 = -1
OpenStudy (gabylovesyou):
i get 15 + 15i - 12i - 12i ?
OpenStudy (gabylovesyou):
whoops 12i^2 at the end
OpenStudy (trojanpoem):
+12
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OpenStudy (gabylovesyou):
but -4 * 3 is -12
OpenStudy (trojanpoem):
It is.
OpenStudy (trojanpoem):
I was talking about 12 i ^2 = 12
Nnesha (nnesha):
|dw:1426191387901:dw| when you multiply 3i times -4i you should get -12i^2 right ?
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