OpenStudy (anonymous):

The product of (a + b)(a − b) is a perfect square trinomial.

5 years ago
OpenStudy (anonymous):

Sometimes Always Never

5 years ago
OpenStudy (zehanz):

If you FOIL it: First: a*a = a² Outer: a*(-b) = -ab Inner: b*a = ab Last: b*(-b) = -b² Add up everything: a² + -ab + ab + b². What do you think about the middle two terms?

5 years ago
OpenStudy (anonymous):

theyre the same?

5 years ago
OpenStudy (anonymous):

it expands to a^2-b^2 so it never a trinomial

5 years ago
OpenStudy (anonymous):

So its never?

5 years ago
OpenStudy (anonymous):

never cuzz the middle terms cancel out meaning you always get a binomial, not a trinomial

5 years ago
OpenStudy (anonymous):

ohhhh okay :) thank you!

5 years ago
OpenStudy (zehanz):

The middle two terms cancel: -ab+ab=0, so you are left with only a²-b². So never a trinomial; there are only two terms.

5 years ago
OpenStudy (gahm8684):

for anyone lookin at this the answer is not never

3 years ago
OpenStudy (hahawowoh):

its not always cause I just got it wrong

2 years ago