2x^2-24x=-20

Solution for 2x^2-24x=-20 equation:

2x^2-24x=-20

We move all terms to the left:

2x^2-24x-(-20)=0

We add all the numbers together, and all the variables

2x^2-24x+20=0

a = 2; b = -24; c = +20;
Δ = b2-4ac
Δ = -242-4·2·20
Δ = 416
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:

$\sqrt{\Delta}=\sqrt{416}=\sqrt{16*26}=\sqrt{16}*\sqrt{26}=4\sqrt{26}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-24)-4\sqrt{26}}{2*2}=\frac{24-4\sqrt{26}}{4}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-24)+4\sqrt{26}}{2*2}=\frac{24+4\sqrt{26}}{4}
$