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1. ${(a + b)}^{2} = ?$

A. $a^{2} - 2 a b + b^{2}$
B. $a^{2} - 2 a b + b^{2}$
C. $a^{2} - 2 a b + b^{2}$
D. $a^{2} - 2 a b + b^{2}$

Answer: Option C

Explanation:

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