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OpenStudy (anonymous):
which of deezis a perfect square trinomial. 25x2 − 40x − 16 9a2 − 20a − 25 25b2 − 15b + 9 16x2 − 56x + 49
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OpenStudy (compassionate):
To identify a perfect square trinomial, the 1st and second term must be a perfect-square. The first and last term are then combined together and multiplied by 2, and that should equal the middle term.
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