Решите

3x^2+130x-133=0

31x^2-29x-2=0

15x^2+10x-5=0

1) 3 х²+133 х-3 х-133=0

х (3 х+133) - (3 х+133) = 0

(3 х+133) (х-1) = 0

3 х+133=0

х-1=0

х=-133/3

х=1

2) 31 х²+2 х-31 х-2=0

х (31 х+2) - (31 х+2) = 0

(31 х+2) (х-1) = 0

31 х+2=0

х-1=0

х=-2/31

х=1

3) 3 х²+2 х-1=0

3 х²+3 х-х-1=0

3 х (х+1) - (х+1) = 0

(х+1) (3 х-1) = 0

х+1=0

3 х-1=0

х=-1

х=1/3