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OpenStudy (anonymous):
After being rearranged and simplified, which of the following equations could be solved using the quadratic formula? A. -x^2+4x+7=2x^2-9 B. 5x+4=3x^2-2 C. -3x^2+9x+3x^2=14+x-1 D. x^3+x^2+x=0
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OpenStudy (anonymous):
all except D, which has the x^3 term others may give solutions including sqrt(negative number), but these are solutions, too.
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