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3x2+7-6 = (3x-2)(x+3) when factored
It is an up parabola.
21x3-35x2+14x = 7x(3x2-5x+2)
3x2 - 7x + 2 = 3x2 - 6x - x + 2 = 3x(x - 2) - 1(x - 2) = (3x - 1)(x - 2) So x = 1/3 or x = 2
It is an equation and the value of x is 2