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OpenStudy (anonymous):
Determine which polynomial is a perfect square trinomial. Answer 16x2 - 24x - 9 49x2 - 28x + 16 9a2 - 30a + 25 25b2 - 45b - 81
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OpenStudy (anonymous):
there is only one that is even factorable amongst those it can't be the first (middle term larger than last in a double negative trinomial) can't be the second (middle term too large) can't be the last one (last term too large) therefore, it's the 3rd one
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