Question

(xy+3xy)². use identity​

Answer 1

Using algebraic identity (a+b)² = a² + b² + 2ab

Here,  (xy+ 3xy)²

xy = a

3xy = b

Substituting

(xy + 3xy)²

= (xy)² + (3xy)² + 2(xy)(3xy)

=x²y² + 9x²y² + 6x²y²

= 16 x²y²