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Mathematics 8 Online
OpenStudy (anonymous):

Which equation is a quadratic equation? 5x + y = -2(x + 5) y - 9 = (x2 + 1)(5x - 1) + 3 y + 7x = -3x(7 - 2x) + 11 3x3 - y = (3x - 2)(x + 5)

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