Question

x^2-26x-120=0
resolver la ecuacion de segundo grado con la formula general
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Answer 1

Ignora la Ā

$x^{2} - 26x - 120=0\\\\x_{12} = \frac{26± \sqrt{(-26)^{2} -4*1*(-120)}}{2*1}\\\\x_{12} = \frac{26± \sqrt{1156}}{2}\\\\x_{12} = \frac{26± 34}{2}\\\\x_{1} = \frac{26 + 34}{2} = 30\\\\x_{2} = \frac{26 - 34}{2} = -4$