Question

Alguém resolve pra mim

Answer 1

Resposta:

coeficiente de a =1

ceficiente de b=1

coeficiente de c= -2

$delta = {1}^{2} - 4 \times 1 \times ( - 2) = 1 + 8 = 9$

$x1 = \frac{ 1 + \sqrt{9}}{2 \times 1} = \frac{1+ 3}{2} = \frac{4}{2} = 2$

$x2 = \frac{ {1}^{2} - 3}{2 \times 1} = \frac{1 - 3}{2} = \frac{ - 2}{2} = - 1$