x2+200x-10000=0

Solution for x2+200x-10000=0 equation:

x2+200x-10000=0

We add all the numbers together, and all the variables

x^2+200x-10000=0

a = 1; b = 200; c = -10000;
Δ = b2-4ac
Δ = 2002-4·1·(-10000)
Δ = 80000
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:

$\sqrt{\Delta}=\sqrt{80000}=\sqrt{40000*2}=\sqrt{40000}*\sqrt{2}=200\sqrt{2}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(200)-200\sqrt{2}}{2*1}=\frac{-200-200\sqrt{2}}{2}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(200)+200\sqrt{2}}{2*1}=\frac{-200+200\sqrt{2}}{2}
$