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OpenStudy (anonymous):
Which number completes the perfect square trinomial? x^2+20x? A. 40 B. 100 C. 25 D. 80
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OpenStudy (anonymous):
B
OpenStudy (cwrw238):
B
OpenStudy (cwrw238):
x^2 + 20x + 100 = (x+10)^2
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