9x=3x^2-2

Solution for 9x=3x^2-2 equation:

9x=3x^2-2

We move all terms to the left:

9x-(3x^2-2)=0

We get rid of parentheses

-3x^2+9x+2=0

a = -3; b = 9; c = +2;
Δ = b2-4ac
Δ = 92-4·(-3)·2
Δ = 105
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(9)-\sqrt{105}}{2*-3}=\frac{-9-\sqrt{105}}{-6}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(9)+\sqrt{105}}{2*-3}=\frac{-9+\sqrt{105}}{-6}
$