Question

-5-x²+6x=0 qual o valor???????

Answer 1

x² + 6x - 5 = 0


∆ = 6² - 4.1.(-5)
∆ = 36 - 20
∆ = 16


x = -6 ± √16/2.1

x = -6 ± 4/2

x' = -6 - 4/2 = -10/2 = -5

x" = -6 + 4/2 = -2/2 = -1


S={ -5, -1 }