Question

(x+y)² +(x-y)² find value​

Answer 1

(x+y)²+(x-y)²

=x²+2xy+y²+(x²-2xy+y²)

=x²+2xy+y²+x²-2xy+y²

=2x²+2y²

=2(x²+y²)

hope you like it

thank you

Answer 2

Answer:

(a+b)² = a²+2ab+b²         (a-b)² = a²-2ab+b²

(x+y)² + (x-y)² = x²+2xy+y²+x²-2xy+y² = 2x²+2y²