11x2=20

Solution for 11x2=20 equation:

11x^2=20

We move all terms to the left:

11x^2-(20)=0

a = 11; b = 0; c = -20;
Δ = b2-4ac
Δ = 02-4·11·(-20)
Δ = 880
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:

$\sqrt{\Delta}=\sqrt{880}=\sqrt{16*55}=\sqrt{16}*\sqrt{55}=4\sqrt{55}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-4\sqrt{55}}{2*11}=\frac{0-4\sqrt{55}}{22}
=-\frac{4\sqrt{55}}{22}
=-\frac{2\sqrt{55}}{11}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+4\sqrt{55}}{2*11}=\frac{0+4\sqrt{55}}{22}
=\frac{4\sqrt{55}}{22}
=\frac{2\sqrt{55}}{11}
$