It is a quadratic equation in X.
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3x2-9x = 0 x(3x-9) = 0 x = 0 or x = 3
9x2 + 3x / 3x equals (3x + 1).9x2 + 3x divided by x is 9x + 3 , and then divided by 3 yields the 3x +1.
x is negative 1x is negative 2
X=-3
x2+3x = 7 x2+3x-7 = 0 Using the quadratic equation formula:- x = -4.541381265 or x = 1.541381265