x^2+10x-18000=0

Solution for x^2+10x-18000=0 equation:

x^2+10x-18000=0

a = 1; b = 10; c = -18000;
Δ = b2-4ac
Δ = 102-4·1·(-18000)
Δ = 72100
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:

$\sqrt{\Delta}=\sqrt{72100}=\sqrt{100*721}=\sqrt{100}*\sqrt{721}=10\sqrt{721}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(10)-10\sqrt{721}}{2*1}=\frac{-10-10\sqrt{721}}{2}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(10)+10\sqrt{721}}{2*1}=\frac{-10+10\sqrt{721}}{2}
$