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Mathematics, 22.09.2019 20:50 hfleysher

Which equation is not a quadratic equation?
y = 3x2 + 2
y = 5x - 2
y = -x2
y = 5x2 - 2x + 7

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Which equation is not a quadratic equation?
y = 3x2 + 2
y = 5x - 2
y = -x2
...
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