Question

(a+b) 2=? Proved that

Answer 1

$(a + b)(a + b) \\ a(a + b) + b(a + b) \\ a {}^{2} + ab + ab + b {}^{2} \\ a {}^{2} + 2ab + b {}^{2}$
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Answer 2

(a+b)²

=(a+b)×(a+b)

=a²+ab+ab+b³

=a²+2ab+b²

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