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OpenStudy (anonymous):
Identify which equation is a quadratic equation. A.))y = −6x − 3 B.))y + x2 = (x − 1)(x + 7) C.))y − 9 = (x − 1)(x2 + 4) D.))y = 5x(x + 3) − 8
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Directrix (directrix):
D.))y = 5x(x + 3) − 8
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