3 + 20х - 6х - 40 = 0
х(3х+20)-2(3х+20)=0
(3х+20)(х-2)=0
3х+20=0
х-2=0
х₁= -
х₂=2
Д=14²-4*3*(-40)=676
х=-14±26/6
х=-14+26/6=2
х=-14-26/6=-20/3
Ответ х1=-20/3 , х2=2
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3
+ 20х - 6х - 40 = 0
х(3х+20)-2(3х+20)=0
(3х+20)(х-2)=0
3х+20=0
х-2=0
х₁= -
х₂=2
Д=14²-4*3*(-40)=676
х=-14±26/6
х=-14+26/6=2
х=-14-26/6=-20/3
Ответ х1=-20/3 , х2=2