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OpenStudy (anonymous):
Determine which polynomial is a perfect square trinomial. A. 36x2 − 18x − 9 B. 4a2 − 28a − 49 C. 25b2 − 20b + 4 D. 4x2 − 6x + 9
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OpenStudy (anonymous):
"A" looks promising
OpenStudy (campbell_st):
(C) (5b - 2)^2
OpenStudy (campbell_st):
(A) and (B) can't be as the constant term is negative (D) the coefficient of double the product of 2x and -3 = -12x the answer shows only -6x
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