Question

determine as raízes da função y=x2+x-2"

Answer 1

$x^{2} +x-2=0\\ \\ \Delta=1^2-4.1.(-2)=1+8=9\\ \\ x=\frac{-1 \pm \sqrt9}{2}=\frac{-1 \pm 3}{2}\\ \\ x_1=-2\\ \\ x_2=1$