Question

2° GRAU

x²+ 3x  -1 =0

Answer 1

$x^2+ 3x -1 =0 \\ \Delta=3^2-4.1.(-1)=9+4=13 \\ \\ x_1=\frac{-3-\sqrt{13}}{2} \\ \\ x_2=\frac{-3+\sqrt{13}}{2}$

Answer 2

x²+3x-1
delta= 9+4
delta=13  

x= (-3 +/- raiz de 13)/ 2