x(x+5)=130

Solution for x(x+5)=130 equation:

x(x+5)=130

We move all terms to the left:

x(x+5)-(130)=0

We multiply parentheses

x^2+5x-130=0

a = 1; b = 5; c = -130;
Δ = b2-4ac
Δ = 52-4·1·(-130)
Δ = 545
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{-(5)-\sqrt{545}}{2*1}=\frac{-5-\sqrt{545}}{2}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(5)+\sqrt{545}}{2*1}=\frac{-5+\sqrt{545}}{2}
$