Which equation is a quadratic equation?
y + 7 = −3x(4 − x) + 9x
y = −2x + 5
y + 2x3 = (2x − 2)(x + 5)
y − 9x = (x2 + 1)(5x − 1) + 3

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if u can rewrite it in something silimiar to that

Well its really hard

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