alleryThe value of $(1 + i)^2$ is:
A$-2i$
B$2$
C$1 + 2i$
D$2i$
Answer & Solution
Correct answer: D. $2i$
We have (1+i)² = 1 + 2i + i².
That is (1+i)² = 1 + 2i − 1.
So (1+i)² = 2i.
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