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Find the roots of the equation using the Quadratic Formula
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$-x^2-2x-7=0$
Learn how to solve equations problems step by step online. Find the roots of -x^2-2x+-7=0. Find the roots of the equation using the Quadratic Formula. For a simpler handling of the equation, change the sign of all terms, multiplying the entire whole by -1. Multiply -1 times -1. 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=2 and c=7. Then substitute the values of the coefficients of the equation in the quadratic formula: \displaystyle x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}.