Question

Solve: (x+y)2 × (x-y)2

Answer 1

Note: Check this attachment.

Answer 2

(a+b)² = a² + b² + 2ab

(a-b)² = a² + b² - 2ab

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

( 2ab - 2ab = 0)

2a² + 2b²

2(a² + b²)