Question

Evaluate and using identities of ( xy + 2z )^2​​

Answer 1

Answer:

x²y²+4z²+4xyz

Step-by-step explanation:

=(xy+2z)²

we know, (a+b)² =a²+b²+2ab

here , a= xy

       b=2z

then, (xy+2z)²=(xy)²+(2z)²+2(xy)(2z)

                       =x²y²+4z²+4xyz