Question

plz solved q no a and b

Answer 1

this is a simple one
x²-(y²-2*3z*y+3z²)
x²-(y-3z)²
(x+y-3z)(x-y+3z)
b.
x²-z²-2y(x-z)
(x+z)(x-z)-2y(x-z)
(x+z-2y)(x-z)