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OpenStudy (anonymous):
solve 5x^2 + 3x - 4=0 by completing the square A) x=(3 +/- sqr root 81)/10 B) x=(-3 +/- sqr root 89)/10 C) x= (-4 +/- sqr root 72)/10 D) x= (-4 +/- sqr root 89)/10
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