MeganLewis
Which polynomial is a perfect square trinomial?
9x2 − 12x + 4
36b2 − 24b + 16
16x2 − 24x − 9
4a2 − 10a − 25



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a^2 + 2ab+b^2

vishweshshrimali5
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\(a^2 + 2ab + b^2\)

vishweshshrimali5
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iF U don't know why then please ask............
\(:)\)

MeganLewis
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That isn't one of the choices

vishweshshrimali5
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That is only a hint.............
compare this with ur choices

MeganLewis
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But none of them even look like that

vishweshshrimali5
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U can compare to the other form that is
\(a^2  2ab + b^2\)

MeganLewis
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none of the choices have that form

91
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alright, let's work on this

91
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let's try to factor this
9x2 − 12x + 4

91
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(3x 2 ) (3x 2 )
choose sign so you can put 12 in middle