Question

Which binomial is equivalent to (xy + z)(xy − z)?

A) x2y2 + z2
B) x2y − z2
C) x2y2 − z2
D) x2y + z2

Answer 1

The correct answer is B)

Answer 2

x2y2 - z2

Explanation:

multiple each expression one by one

(xy + z)(xy - z) = x^2y^2 - xzy + xzy -z^2 ➡ +xzy will eliminate -xzy

and only x^2y^2 - z^2 will be left