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Mathematics 15 Online
OpenStudy (anonymous):

Helpppp! 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)

OpenStudy (lalaly):

quadratic equation is an equation where the highest power of x is 2

OpenStudy (anonymous):

\[y = 2x+7x(x+1)\]

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