9514 1404 393Answer:7 +4iStep-by-step explanation:(2 +3i)(2 -i) = 2(2 -i) +3i(2 -i) = 4 -2i +6i +3 =7 +4i_____i = √-1, so i^2 = -1. Otherwise the product is identical to what you would get if "i" were a variable....

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