x(x+1)=576

Solution for x(x+1)=576 equation:

x(x+1)=576

We move all terms to the left:

x(x+1)-(576)=0

We multiply parentheses

x^2+x-576=0

a = 1; b = 1; c = -576;
Δ = b2-4ac
Δ = 12-4·1·(-576)
Δ = 2305
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{2305}}{2*1}=\frac{-1-\sqrt{2305}}{2}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(1)+\sqrt{2305}}{2*1}=\frac{-1+\sqrt{2305}}{2}
$