Question

factorise (2x-y-z)(2x-y-z)(2x-y-z)+(2y-z-x)(2y-z-x)((2y-z-x)+(2z-x-y)(2z-x-y)(2z-x-
y)e

Answer 1

3(2x-y-z)(2y-z-x)(2z-x-y) is the answer.