Question

Find the value of (x+y)2 + (x-y)2​

Answer 1

Answer:

See the attachment above.

I hope it helps uh out!!

Answer 2

Since,

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

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

So,

$= {(x + y)}^{2} + {(x - y)}^{2} \\ = {x}^{2} + {y}^{2} + 2xy + {x}^{2} + {y}^{2} - 2xy \\ = 2 {x}^{2} + 2 {y}^{2} + 2xy - 2xy \\ = 2 {x}^{2} + 2 {y}^{2} = 2( {x}^{2} + {y}^{2} )$

#hope_it_help_✌