$$x^2+20x = 120$$
Answer
$$ \begin{matrix}x_1 = -10-2 \sqrt{ 55 } & x_2 = -10+2 \sqrt{ 55 } \\[1 em] \end{matrix} $$
Explanation
$$ \begin{aligned} x^2+20x &= 120&& \text{move all terms to the left hand side } \\[1 em]x^2+20x-120 &= 0&& \\[1 em] \end{aligned} $$
$ x^{2}+20x-120 = 0 $ is a quadratic equation.
You can use step-by-step quadratic equation solver to see a detailed explanation on how to solve this equation.
This page was created using
Polynomial Equations Solver