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OpenStudy (anonymous):
What number makes this trinomial a perfect square? x2 + 7x + ___ A. -49/4 B. 7/4 C. 7/2 D. 49/4
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OpenStudy (nurali):
a^2+2ab+b^2 x^2 +2x(7/2) +(7/2)^2 x^2+7x+49/4
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