Question

Write the product in standard form. (2 + 3i)(2 - i)

Answer 1

9514 1404 393

Answer:

7 +4i

Explanation:

(2 +3i)(2 -i) = 2(2 -i) +3i(2 -i) = 4 -2i +6i +3 = 7 +4i

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i = √-1, so i^2 = -1. Otherwise the product is identical to what you would get if "i" were a variable.