Question

using identity (x+a)(x+b)=x^+(a+b)x+an find: (xyz-4)(xyz-2)​

Answer 1

Step-by-step explanation:

(xyz - 4)(xyz - 2)

= (xyz + - 4)(xyz + - 2). ( using IV identity )

= (xyz)^2 + (-4 + -2)xyz + -4*-2

= x^2 y^2 z^2 - 6xyz + 8