thatgirl666
The product of (a + b)(a − b) is a perfect square trinomial.
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thatgirl666
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Sometimes
Always
Never
ZeHanz
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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?
thatgirl666
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theyre the same?
timo86m
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it expands to a^2-b^2
so it never a trinomial
thatgirl666
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So its never?
timo86m
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never cuzz the middle terms cancel out meaning you always get a binomial, not a trinomial
thatgirl666
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ohhhh okay :) thank you!
ZeHanz
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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.
gahm8684
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for anyone lookin at this the answer is not never
Hahawowoh
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its not always cause I just got it wrong