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Question
Evaluate the following if z = 5 – 2i and w = – 1 + 3i
z2 + 2zw + w2
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Solution
z2 + 2zw + w2 = (z + w)2 ......[from (i)]
= (4 + i)2
= 16 – 1 + 8i
= 15 + 8i
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