x^2+40x-1125=0

Solution for x^2+40x-1125=0 equation:

x^2+40x-1125=0

a = 1; b = 40; c = -1125;
Δ = b2-4ac
Δ = 402-4·1·(-1125)
Δ = 6100
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:

$\sqrt{\Delta}=\sqrt{6100}=\sqrt{100*61}=\sqrt{100}*\sqrt{61}=10\sqrt{61}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(40)-10\sqrt{61}}{2*1}=\frac{-40-10\sqrt{61}}{2}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(40)+10\sqrt{61}}{2*1}=\frac{-40+10\sqrt{61}}{2}
$