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OpenStudy (anonymous):
Which equation is a quadratic equation? 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):
the second one is
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