3(2x+1)^2-(1+2x)=0
(2x+1)(6x+3-1)=0
(2x+1)(6x+2)=0
x=-1/2 or x=-1/3
25(x+1)^2-49(2x-1)^=0
25(x+1)^2=49(2x-1)^
5(x+1)=7(2x-1)
5x+5=14x-7
9x=12
x=4/3
or 5(x+1)=7(1-2x)
5x+5=7-14x
19x=2
x=2/19
3(2x+1)^2-(1+2x)=0
(2x+1)(6x+3-1)=0
(2x+1)(6x+2)=0
x=-1/2 or x=-1/3
25(x+1)^2-49(2x-1)^=0
25(x+1)^2=49(2x-1)^
5(x+1)=7(2x-1)
5x+5=14x-7
9x=12
x=4/3
or 5(x+1)=7(1-2x)
5x+5=7-14x
19x=2
x=2/19