Prove that x ( x + 1 ) = 2 ( x - 1 ) is a quadratic equation ??

1.	Prove that x ( x + 1 ) = 2 ( x - 1 ) is a quadratic equation ??
Answer» Ok thanks for answering. Welldone x ( x + 1 ) = 2 ( x - 1 )\xa0\xa0x2 + x = 2x - 2x2 + x - 2x + 2 = 0x2 - x + 2 = 0It is quadratic equation.\xa0

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