Question

6x²+x-1=0 respodem rápido

Answer 1

6x² + x - 1 = 0

a = 6, b = 1, c = - 1

Δ = b² - 4ac

Δ = 1² - 4 . 6 . (- 1)

Δ = 1 + 24

Δ = 25

x = (- b ± √Δ)/2a

x = (- 1 ± √25)/(2 . 6)

x = (- 1 ± 5)/12

x' = (- 1 + 5)/12 = 4/12 = 1/3

x'' = (- 1 - 5)/12 = - 6/12 = - 1/2

x = 1/3

x = - 1/2

Answer 2

a=6 b=1 c=-1

∆= b² -4.a.c
∆= 1² -4.(6).(-1)
∆=1 + 24
∆= 25

x = -b ± √∆
2.a
x = -(1)±√25
2.(6)
x' = -1 + 5 = 4 ←
12 12

x" = -1 - 5= - 6 ←
12 12

respostas S={ -6/12, 4/12}