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OpenStudy (anonymous):
Operations with complex numbers? 7i*3i(-8-6i). HELP PLEASE!
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ganeshie8 (ganeshie8):
i^2 = -1
ganeshie8 (ganeshie8):
so, 7i*3i = 21*i^2 = 21(-1) = -21
ganeshie8 (ganeshie8):
-21(-8-6i) distribute..
OpenStudy (anonymous):
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