Question

Factorise : x ( x2 + y2 - z2 ) +y ( -x2 -y2 +z2 ) -z ( x2 + y2 -z2 )

Answer 1

Step-by-step explanation:

x(x^2+y^2-z^2)+y(-x^2-y^2+z^2)-z(x^2+y^2-z^2)

=x^3+xy^2-xz^2-xy^2-y^3+yz^2-xz^2-yz^2+z^3

=x^3-y^3+z^3+2xz^2