Express $(1 + i)^{2}$ in $a + ib$ form.
A$2i$
B$1 + 2i$
C$1 - 2i$
D$2 + i$
Answer & Solution
Correct answer: A. $2i$
$(1 + i)^{2} = 1 + 2i + i^{2} = 2i$.
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