720x^2+1800x-720=0

Solution for 720x^2+1800x-720=0 equation:

720x^2+1800x-720=0

a = 720; b = 1800; c = -720;
Δ = b2-4ac
Δ = 18002-4·720·(-720)
Δ = 5313600
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:

$\sqrt{\Delta}=\sqrt{5313600}=\sqrt{129600*41}=\sqrt{129600}*\sqrt{41}=360\sqrt{41}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(1800)-360\sqrt{41}}{2*720}=\frac{-1800-360\sqrt{41}}{1440}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(1800)+360\sqrt{41}}{2*720}=\frac{-1800+360\sqrt{41}}{1440}
$