(1)(6x-1)2-25=0
(6x-1)2=25
6x-1=±25
∴x1=
,x2=-4; 13 3
(2)(2x+1)2=3(2x+1)
设2x+1=y,则原方程为y2=3y,
解得y1=0,y2=3,
当y=0时,2x+1=0,解得x1=-
1 2
当y=3时,2x+1=3时,解得x2=1
∴原方程的解为x1=-
,x2=1;1 2
(3)x2+4x-1=0
x2+4x+4-5=0
(x+2)2=5
x+2=±
5
∴x1=
?2,x2=-
5
-2;
5
(4)2x2-7x+3=0
(2x-1)(x-3)=0
∴x1=
,x2=3.1 2