Question

prove :- 2(a2+b2)=(a+b)2+(a-b)2
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Answer 1

Answer:

$2( {x}^{2} + {y}^{2} ) = {(x + y)}^{2} + {(x -y)}^{2} \\ lhs \: = 2 {x}^{2} + 2 {y}^{2} and \: \\ rhs = {x}^{2} + {y}^{2} + 2xy + {x}^{2} + {y}^{2} - 2xy \\ = > 2 {x}^{2} + 2{y}^{2} \\ so \: \: \: \: \: lhs = rhs$

so your answer is given that❤️