Question

Resolve por completamento do quadrado 6x ao quadrado -x-1=0

Answer 1

6x² - x - 1 = 0

Δ= (-1)² - 4 . 6 . (-1)
Δ= 1 + 24
Δ= 25

x= 1 ± 5 / 12
x'= 6 / 12 (÷6) = 1 / 2
x"= -4 / 12 (÷4) = - 1 / 3

Answer 2

6x^2 - x - 1=0

/\=(-1) - 4.6. (-1)
/\=1+24
/\=25

x= 1+- 5/12
x'=6/12--->÷6=>1/2
x"= -4/12--->÷4=> -1/3



S={1/2 ; -1/3 }