3x^2-54x=-204

Solution for 3x^2-54x=-204 equation:

3x^2-54x=-204

We move all terms to the left:

3x^2-54x-(-204)=0

We add all the numbers together, and all the variables

3x^2-54x+204=0

a = 3; b = -54; c = +204;
Δ = b2-4ac
Δ = -542-4·3·204
Δ = 468
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:

$\sqrt{\Delta}=\sqrt{468}=\sqrt{36*13}=\sqrt{36}*\sqrt{13}=6\sqrt{13}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-54)-6\sqrt{13}}{2*3}=\frac{54-6\sqrt{13}}{6}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-54)+6\sqrt{13}}{2*3}=\frac{54+6\sqrt{13}}{6}
$