Question

qual o valor desta equação ?? me ajudem rápido

Answer 1

Resposta:

$x = \dfrac{-b\pm\sqrt{\Delta} }{2a}= \dfrac{-2\pm\sqrt{36} }{2\times 1} = \dfrac{-2\pm 6}{2}$

$x_1 = \dfrac{-2+ 6}{2} = \dfrac{4}{2} = 2\\\\x_2 = \dfrac{-2-6}{2} = \dfrac{-8}{2} = - 8$