Question

Eq. do 2 grau utilizando a fórmula de baskara
$x^{2}$+2x-8

Answer 1

Olá

Calculando o delta

$\triangle=b^2-4\cdot a\cdot c \\ \\ \triangle=2^2-4.1.(-8) \\ \\ \triangle=4-(-32) \\ \\ \triangle=36$


Calculando as raizes

$x= \frac{-b+- \sqrt{\triangle} }{2a} \\ \\ x= \frac{-2+- \sqrt{36} }{2a} \\ \\ x'= \frac{-2+6}{2} ~~~~~~~~~~x'= \frac{4}{2} ~ ~~~~~ ~~~~\boxed{x'=2} \\ \\ x''= \frac{-2-6}{2}~~~~~~~~x''= \frac{-8}{2} ~~~~~~~~\boxed{x''=-4}$







Dúvidas? comente.