X2+20=22-2x

Solution for X2+20=22-2x equation:

X2+20=22-2X

We move all terms to the left:

X2+20-(22-2X)=0

We add all the numbers together, and all the variables

X2-(-2X+22)+20=0

We add all the numbers together, and all the variables

X^2-(-2X+22)+20=0

We get rid of parentheses

X^2+2X-22+20=0

We add all the numbers together, and all the variables

X^2+2X-2=0

a = 1; b = 2; c = -2;
Δ = b2-4ac
Δ = 22-4·1·(-2)
Δ = 12
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:

$\sqrt{\Delta}=\sqrt{12}=\sqrt{4*3}=\sqrt{4}*\sqrt{3}=2\sqrt{3}$
$X_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(2)-2\sqrt{3}}{2*1}=\frac{-2-2\sqrt{3}}{2}
$
$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(2)+2\sqrt{3}}{2*1}=\frac{-2+2\sqrt{3}}{2}
$