3(3х+1)²-4(3х+1)=0
(3х+1)*(3*(3х+1)-4)=0
3х+1=0 или 3*(3х+1)-4=0
3х=-1 9х+3-4=0
х=-1/3 9х=4-3
9х=1
х=1/9
ответ: -1/3 и 1/9
3(3х+1)²-4(3х+1)=0
(3х+1)*(3*(3х+1)-4)=0
3х+1=0 или 3*(3х+1)-4=0
3х=-1 9х+3-4=0
х=-1/3 9х=4-3
9х=1
х=1/9
ответ: -1/3 и 1/9