X*3x=600

Solution for X*3x=600 equation:

X*3X=600

We move all terms to the left:

X*3X-(600)=0

Wy multiply elements

3X^2-600=0

a = 3; b = 0; c = -600;
Δ = b2-4ac
Δ = 02-4·3·(-600)
Δ = 7200
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:

$\sqrt{\Delta}=\sqrt{7200}=\sqrt{3600*2}=\sqrt{3600}*\sqrt{2}=60\sqrt{2}$
$X_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-60\sqrt{2}}{2*3}=\frac{0-60\sqrt{2}}{6}
=-\frac{60\sqrt{2}}{6}
=-10\sqrt{2}
$
$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+60\sqrt{2}}{2*3}=\frac{0+60\sqrt{2}}{6}
=\frac{60\sqrt{2}}{6}
=10\sqrt{2}
$