X^2+x=10000

Solution for X^2+x=10000 equation:

X^2+X=10000

We move all terms to the left:

X^2+X-(10000)=0

a = 1; b = 1; c = -10000;
Δ = b2-4ac
Δ = 12-4·1·(-10000)
Δ = 40001
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$X_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$X_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(1)-\sqrt{40001}}{2*1}=\frac{-1-\sqrt{40001}}{2}
$
$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(1)+\sqrt{40001}}{2*1}=\frac{-1+\sqrt{40001}}{2}
$