15x2=180

Solution for 15x2=180 equation:

15x^2=180

We move all terms to the left:

15x^2-(180)=0

a = 15; b = 0; c = -180;
Δ = b2-4ac
Δ = 02-4·15·(-180)
Δ = 10800
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:

$\sqrt{\Delta}=\sqrt{10800}=\sqrt{3600*3}=\sqrt{3600}*\sqrt{3}=60\sqrt{3}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-60\sqrt{3}}{2*15}=\frac{0-60\sqrt{3}}{30}
=-\frac{60\sqrt{3}}{30}
=-2\sqrt{3}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+60\sqrt{3}}{2*15}=\frac{0+60\sqrt{3}}{30}
=\frac{60\sqrt{3}}{30}
=2\sqrt{3}
$