3х²-5х-18=0
D=(-5)²-4*3*(-18)=241
x₁=(5-√241)/6
х₂=(5+√241)/6
x₁х₂ = (5-√241)/6*(5+√241)/6 = (5-√241)(5+√241)/36 = (25-241)/6 = –6.
3х²-5х-18=0
D=(-5)²-4*3*(-18)=241
x₁=(5-√241)/6
х₂=(5+√241)/6
x₁х₂ = (5-√241)/6*(5+√241)/6 = (5-√241)(5+√241)/36 = (25-241)/6 = –6.