3x*x=1800

Solution for 3x*x=1800 equation:

3x*x=1800

We move all terms to the left:

3x*x-(1800)=0

Wy multiply elements

3x^2-1800=0

a = 3; b = 0; c = -1800;
Δ = b2-4ac
Δ = 02-4·3·(-1800)
Δ = 21600
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:

$\sqrt{\Delta}=\sqrt{21600}=\sqrt{3600*6}=\sqrt{3600}*\sqrt{6}=60\sqrt{6}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-60\sqrt{6}}{2*3}=\frac{0-60\sqrt{6}}{6}
=-\frac{60\sqrt{6}}{6}
=-10\sqrt{6}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+60\sqrt{6}}{2*3}=\frac{0+60\sqrt{6}}{6}
=\frac{60\sqrt{6}}{6}
=10\sqrt{6}
$