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OpenStudy (anonymous):
Solve x2 + 9x + 20 = 0. Answer x = 2, x = 10 x = -2, x = -10 x = -5, x = -4 x = 5, x = 4
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OpenStudy (anonymous):
factorize: (x+4)(x+5)=0 x=-4,x=-5
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