(13+-sqrt(169+120))/6=(13+-17)/6
a=-2/3
a=5
3а^2 - 13a - 10=(a-5)(a+2/3)
3а^2-13a-10=(х+2/3)(х-5)
D=169-4*3*(-10)=169+120=289=17^2>0 (2корня)
а1=13-17/6=-2/3; а2=13+17/6=30/6=5.
(13+-sqrt(169+120))/6=(13+-17)/6
a=-2/3
a=5
3а^2 - 13a - 10=(a-5)(a+2/3)
3а^2-13a-10=(х+2/3)(х-5)
D=169-4*3*(-10)=169+120=289=17^2>0 (2корня)
а1=13-17/6=-2/3; а2=13+17/6=30/6=5.