" (a) "x^(2)+y^(2)+2xy-z^(2)

Prove that quad det ([yx-x^(2),zx-y^(2),xy-z^(2)zx-y^(2),xy-z^(2),yz-x^(2)xy-z^(2),yz-x^(2),zx-y^(2)]) is divisible by (x+y+z) and hence find the quotient.

Factorize: 2xy-(x^(2)+y^(2)-z^(2))

Factorise : (v) x^(2) - 2xy + y^(2) - z^(2)