Question

(x² - 2xy + y^2) – z²​

Answer 1

Answer:

x^2 - y^2 -z^2

Step-by-step explanation:

(x^2 - y^2) = x^2 - 2xy -y^2

So,( x^2 - 2xy -y^2) - z^2

=(x^2 - y^2) - z^2

=x^2 - y^2 - z^2