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OpenStudy (anonymous):
Which equation is a quadratic equation? Answer 5x + y = -2(x + 5) 3x^3 - y = (3x - 2)(x + 5) y + 7x = -3x(7 - 2x) + 11 y - 9 = (x^2 + 1)(5x - 1) + 3
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OpenStudy (anonymous):
third one
OpenStudy (cwrw238):
a quadratic equation has degree 2 - that is it will contain x^2 as the highest power
OpenStudy (cwrw238):
yes third one is correct if you expand the brackets you get 6x^2 as term with the highest power
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