sierra73
sierra73
25-10-2017
Mathematics
contestada
9i(4+5i) multiply the following
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altavistard
altavistard
25-10-2017
Recall that i^2 = -1.
9i(4) = 36i, and 9i(5i) = 45(-1) = - 45.
Thus, the desired product is -45 + 36i.
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