Question

The product of (a − b)(a − b) is a^2 − b^2.

Sometimes

Always

Never

Answer 1

this is a rule...the difference of two squares \[a^2 - b^2 = (a+b)(a-b)\]
you can prove it by using FOIL
\[(a+b)(a-b) = a^2 - ab + ab + b^2 \implies a^2 -b^2\]

Answer 2

so its always

Answer 3

Yes.

Answer 4

Thanks !

Answer 5

welcome