3=3x^2-6x

Solution for 3=3x^2-6x equation:

3=3x^2-6x

We move all terms to the left:

3-(3x^2-6x)=0

We get rid of parentheses

-3x^2+6x+3=0

a = -3; b = 6; c = +3;
Δ = b2-4ac
Δ = 62-4·(-3)·3
Δ = 72
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:

$\sqrt{\Delta}=\sqrt{72}=\sqrt{36*2}=\sqrt{36}*\sqrt{2}=6\sqrt{2}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(6)-6\sqrt{2}}{2*-3}=\frac{-6-6\sqrt{2}}{-6}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(6)+6\sqrt{2}}{2*-3}=\frac{-6+6\sqrt{2}}{-6}
$