$-32 - 24i$
Work Step by Step
RECALL: (1) $a(b-c) = ac - bc$ (2) $i^2=-1$ Use rule (1) above to obtain: $=8i(4i) - 8i(3) \\=32i^2 - 24i$ Use rule (2) above to obtain: $=32(-1) - 24i \\=-32 - 24i$
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