2x=3x^2-15

Solution for 2x=3x^2-15 equation:

2x=3x^2-15

We move all terms to the left:

2x-(3x^2-15)=0

We get rid of parentheses

-3x^2+2x+15=0

a = -3; b = 2; c = +15;
Δ = b2-4ac
Δ = 22-4·(-3)·15
Δ = 184
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

The end solution:

$\sqrt{\Delta}=\sqrt{184}=\sqrt{4*46}=\sqrt{4}*\sqrt{46}=2\sqrt{46}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(2)-2\sqrt{46}}{2*-3}=\frac{-2-2\sqrt{46}}{-6}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(2)+2\sqrt{46}}{2*-3}=\frac{-2+2\sqrt{46}}{-6}
$