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x=−b±b2−4ac2a x= \dfrac { -b\pm \sqrt { b ^2 - 4ac } }{ 2a } x=2a−b±b2−4ac
Using the quadratic formula above, find the roots of the equation
x2−20x−69=0. x^2-20x-69=0.x2−20x−69=0.
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