Question

solve this plzz help me​

Answer 1

Answer:

I'm not understanding pls post it again pls

Answer 2

Answer:

9x²+12xz+4z²-4y²

= {(3x)²+2*3x*2z+(2z)²}-4y²

= (3x+2z)²-(2y)² ( use identity (a+b)²=a²+2ab+b²)

= ( 3x+2z+2y)(3x+2z-2y) ( use identity a²-b²= (a+b)(a-b) )

Ans:(3x+2z+2y)(3x+2z-2y)