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Question
Answer the following:
Simplify the following and express in the form a + ib:
(2 + 3i)(1 − 4i)
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Solution
(2 + 3i)(1 − 4i) = 2 − 8i + 3i − 12i2
= 2 − 5i − 12(− 1) ...[∵ i2 = − 1]
= 14 − 5i
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