Question

The product of (a − b)(a − b) is a perfect square trinomial. Sometime, always, or never?

Answer 1

yes, always.

Answer 2

ok thank you!
but why?

Answer 3

note that (a-b)(a-b) = (a-b)^2

Answer 4

and (a-b)^2 leads to a perfect square trinomial. :))

Answer 5

by foiling (a-b)^2 = a^2 -2ab +b^2 , which is a perfect square trinomial.

Answer 6

ohhh i see ok well thank you :)

Answer 7

most welcome, good day!