Question

(x+y-z)(x²+y²+z²-xy+yz+zx)

Answer 1

$(x + y - z)x {}^{2} + y { }^{2} + z {}^{2} - xy + yz + zx = (x + y - z) {}^{3}$

Answer 2

$(x + y - z)( {x}^{2} + {y}^{2} + {z}^{2 } - xy + yz + zx) \\ = ( {x}^{3} + {y}^{3} - {z}^{3} + 3xyz)$