2x*x=22.5

Solution for 2x*x=22.5 equation:

2x*x=22.5

We move all terms to the left:

2x*x-(22.5)=0

We add all the numbers together, and all the variables

2x*x-22.5=0

Wy multiply elements

2x^2-22.5=0

a = 2; b = 0; c = -22.5;
Δ = b2-4ac
Δ = 02-4·2·(-22.5)
Δ = 180
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:

$\sqrt{\Delta}=\sqrt{180}=\sqrt{36*5}=\sqrt{36}*\sqrt{5}=6\sqrt{5}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-6\sqrt{5}}{2*2}=\frac{0-6\sqrt{5}}{4}
=-\frac{6\sqrt{5}}{4}
=-\frac{3\sqrt{5}}{2}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+6\sqrt{5}}{2*2}=\frac{0+6\sqrt{5}}{4}
=\frac{6\sqrt{5}}{4}
=\frac{3\sqrt{5}}{2}
$