3X = x2 - 2x
subtract 3X from each side
X2 - 5X = 0
factor out an X
X(X - 5) = 0
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X = 0
--------or
X = 5
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3x2 + 2x - 8 = 0 is a quadratic equation.
3x=2x-12x=-12
It is a quadratic equation and its solutions are: x = -3/2 and x = 3
(x + 3)(3x - 2)
5x3 - 3x2 + 2x = x*(5x2 - 3x + 2) The quadratic has no real factors.