Question: 7. (10pts) Simplify the following complex expressions: (a) (2 + 7i) + (3 -42) (b) 3i(5 - 2i) (c) (4 + 2i) (1 -2) 1

7. (10pts) Simplify the following complex expressions: (a) (2 + 7i)

7. (10pts) Simplify the following complex expressions: (a) (2 + 7i) + (3 -42) (b) 3i(5 - 2i) (c) (4 + 2i) (1 -2) 1 - 32 (d) 4+ 2i

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