Question

1. Quais são as raízes reais da equação x2 - X-6 = 0 ?​

Answer 1

$x^{2} - x - 6 = 0$

Δ = $(-1)^{2} - 4.1.(-6)$

Δ = $1 + 24$

Δ = 25

x = $\frac{-(-1)+-\sqrt{25} }{2.1}$

x = $\frac{1+-5}{2}$

x' = $\frac{1 + 5}{2}$

x'' = $\frac{1 - 5}{2}$

x' = 3

x'' = -2