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Solve the product $x\left(x+20\right)$
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$x^2+20x=200$
Learn how to solve one-variable linear equations problems step by step online. Solve the equation x(x+20)=200. Solve the product x\left(x+20\right). Rewrite the equation. To find the roots of a polynomial of the form ax^2+bx+c we use the quadratic formula, where in this case a=1, b=20 and c=-200. Then substitute the values of the coefficients of the equation in the quadratic formula: \displaystyle x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}. Simplifying.