It's just like FOIL.
2(5) + 2(3i) + 2i(5) + 2i(3i)
10 + 6i + 10i + 6i2
Remember that i is the square root of -1, so if we square i, we get -1.
10 + 6i + 10i + 6(-1)
16i + 4
Carol K.
asked • 07/29/19What are the steps to find (2+2i)(5+3i)?
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