Question

.. AYUDAAA X FAVOR ALGUIEN LO SABE HACER ​

Answer 1

Respuesta:

$x_{1} = 4 \\x_{2} = -2$

Explicación paso a paso:

$x_{1,2} = 1.x^{2} -2x-8$

Aplicamos la Formula General:

$x_{1,2} = \frac{-b +-\sqrt{b^{2} -4ac} }{2a} \\\\Donde:\\a=1\\b=-2\\c=-8\\\\ x_{1,2} = \frac{-(-2) +-\sqrt{(-2)^{2} -4(1)(-8)} }{2(1)} \\ x_{1,2} = \frac{2 +-\sqrt{(4 +32)} }{2} \\x_{1,2} = \frac{2 +-\sqrt{36} }{2} \\x_{1,2} = \frac{2 +-6 }{2} \\\\x_{1} = \frac{2 +6 }{2} \\x_{2} = \frac{2 -6 }{2} \\\\x_{1} = 4 \\x_{2} = -2$