Răspunsuri

2014-09-29T16:24:50+03:00
6x^2 - x -1 =0 =>  (2x-1) (3x+1) = 0
=> 2x-1=0 => x=1/2
=> 3x+1=0 => x=-1/3
2014-09-29T16:28:24+03:00
6x²-x-1=0    a=6      b=-1    c=-1
Δ=b²-4ac=(-1)²-4·6·(-1)=1+24=25      √Δ=+5
x₁=-b+√Δ supra 2·a=1+5 supra 12=6 supra 12=1 supra 2
x₂=-b-√Δ supra 2·a=1-5 supra 12=-4 supra 12=-1 supra 3