Question

proved that (a+b)=a2+b2+2ab
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Answer 1

to prove÷

$( {a + b})^{2} = {a}^{2} + {b}^{2} + 2ab$

proof-

RHS-

${a}^{2} + {b}^{2} + 2ab \\ ({a + b})^{2} - 2ab + 2ab \: \: \: ( {a}^{2} + {b}^{2} = (we \: know \: that ({a + b})^{2} - 2ab) \\ ({a + b})^{2}$

LHS PROVED