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Mathematics 24 Online
OpenStudy (anonymous):

Identify which equation is a quadratic equation. y = −6x − 3 y + x2 = (x − 1)(x + 7) y − 9 = (x − 1)(x2 + 4) y = 5x(x + 3) − 8

OpenStudy (anonymous):

Simplify them and check.

OpenStudy (anonymous):

then what?

OpenStudy (anonymous):

Then you'll know. All you have to do is simplify each equation and you'll know whether they're a quadratic or not.

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