Question

find the value of :- (x + y)²+(x-y)²
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Answer 1

Step-by-step explanation:

Here is the ans

(x + y)²+(x-y)²

$\sf \: = x^{2} + 2xy + {y}^{2} + {x}^{2} - 2xy + {y}^{2}$

$= \sf \: 2 {x}^{2} + 2 {y}^{2}$

$= \sf \: 2 ({x}^{2} + {y}^{2} )$