3x*x=750

Solution for 3x*x=750 equation:

3x*x=750

We move all terms to the left:

3x*x-(750)=0

Wy multiply elements

3x^2-750=0

a = 3; b = 0; c = -750;
Δ = b2-4ac
Δ = 02-4·3·(-750)
Δ = 9000
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:

$\sqrt{\Delta}=\sqrt{9000}=\sqrt{900*10}=\sqrt{900}*\sqrt{10}=30\sqrt{10}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-30\sqrt{10}}{2*3}=\frac{0-30\sqrt{10}}{6}
=-\frac{30\sqrt{10}}{6}
=-5\sqrt{10}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+30\sqrt{10}}{2*3}=\frac{0+30\sqrt{10}}{6}
=\frac{30\sqrt{10}}{6}
=5\sqrt{10}
$