Question

equação do 2 grau 5x +4x-1=0

Answer 1

$5 {x}^{2} + 4x - 1 = 0 \\ \\ x = \frac{ - 4 + - \sqrt{ {4}^{2} - 4 \times 5 \times ( - 1)} }{2 \times 5} \\ \\ x = \frac{ - 4 + - \sqrt{16 + 20} }{10} \\ \\ x = \frac{ - 4 + - \sqrt{36} }{10} \\ \\ x = \frac{ - 4 + - 6}{10}$

Separe as Raizes

$x_{1} = \frac{ - 4 + 6}{10} \\ \\ x_{1} = \frac{2}{10} \\ \\ x_{1} = \frac{1}{5} \\ \\ x_{1} = 0.2$

$x_{2} = \frac{ - 4 - 6}{10} \\ \\ x_{2} = \frac{ -10}{10} \\ \\ x_{2} = - 1$

s = {-1 e 0,2}