(5x-1)²=3(5x-1) (5x-1)²-3(5x-1) =0(5x-1)(5x-1-3) =0(5x-1)(5x-4) =0x=1/5或x=4/5
(5x-1)²=3(5x-1)(5x-1)²-3(5x-1)=0(5x-1)(5x-1-3)=0(5x-1)(5x-4)=05x-1=0,5x-4=0x=1/5,x=4/5
当5x-1=0时,有x=1/5当5x-1不等于0时 有5x-1=3,得x=4/5