The Total solution for NCERT class 6-12
x3 – 8y3 + 27z3 +18xyz= (x)3 + (-2y)3 + (3z)3 – 3 x xx (-2y) (3 z)= (x – y + 3z) (x2 + 4y2 + 9z2 +2xy + 6yz – 3zx)