Question

(a-b) (a+b)-(a+b)(a+b)

Answer 1

Answer:

-2b²

Step-by-step explanation:

a²-b²-(a²+b²)

a²-b²-a²-b²

-2b²

hope this helps you

Answer 2

Answer:

(a-b) (a+b)-(a+b)(a+b)

=a^2-b^2-(a+b)(a+b)

=a^2-b^2-(a+b)^2

=a^2-b^2-(a^2+b^2+2ab)

=a^2-b^2-a^2-b^2-2ab

=-2b^2-2ab

Hope it helps you.