Question

use identity and simplify: ( xyz - 4 )( xyz + 2)​

Answer 1

Answer:

(xyz-4)(xyz-2)

(x+a)(x+b) = x^2+(a+b)x+ab [using identity 4]

xyz^2+(-4-2)xyz+-4×-2

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

Hope it helps <3