This is only half of an equation.
If -x^2 + 3x +2y = 0, then x^2 -3x = 2y and y = (x^2-3x)/2
Solving for x is the inverse, but difficult without a second equation.
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2x2-6x+2y+18 = 0. Subtract the 2y from both sides. 2x2-6x+18 = -2y. Divide all by -2 to get y by itself. -x2+3x-9 = y. This graph is going to be a parabola that opens downward, like a frown.
is a quadratic equation for y, in terms of x.
The discriminant is -11.
x2 + 3x - 10 = (x + 5)(x - 2) ⇒ x = -5 or 2
x2+3x = 7 x2+3x-7 = 0 Using the quadratic equation formula:- x = -4.541381265 or x = 1.541381265