Plz tell quick it is argunt – InterviewSolution

1.

Plz tell quick it is argunt

Answer»

$( a + b {)}^{2} = (a + b)(a + b) \\ = a(a + b) + b(a + b) \\ = {a}^{2} + ab + ab + {b}^{2} \\ = {a}^{2} + 2ab + {b}^{2} \\ hence \: \: \: proved$

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