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Which equation is a quadratic equation? y + 3 = 5x + 10 y + 4x2 = (4x − 2)(x + 3) y − 8x = (x2 + 1)(9x − 7) y = 2x + 7x(x + 1)
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i think it might be d
How
only c is not
y = 5x+7 = 0x^2+5x+7
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