Question

(x+2y )²=x²+ ................+4y²​

Answer 1

in these we have to apply the identity

(a + b)² = a² + 2ab + b²

so according to the question

(x + 2y)² = (x)² + 2(x)(2y) + (2y)²

= x² + 4xy + 4y²

Answer 2

Answer: (x+2y)² = x² + 4xy + 4y²

This is done using the identity, (a+b)² = a² + 2ab + b²

HOPE THIS HELPS.....