(1) (3x-1)²=4(2x+3)²
3x-1=4x+6 或3x-1=-4x-6
得x=-7或x=-5/7
(2) 4(y-1)²=y(y-1)
(4(y-1)-y)(y-1)=0
(3y-1)(y-1)=0
y1=1/3 y2=1
(3) 25(x-7)²=16(x+4)²
5x-35=4x+16 或5x-35=-4x-16
x=51或x=19/9
(4) 0.2x²+0.75x=0
4x²+25x=0
x=0或x=-25/4
(1) (3x-1)²=4(2x+3)²
3x-1=4x+6 或3x-1=-4x-6
得x=-7或x=-5/7
(2) 4(y-1)²=y(y-1)
(4(y-1)-y)(y-1)=0
(3y-1)(y-1)=0
y1=1/3 y2=1
(3) 25(x-7)²=16(x+4)²
5x-35=4x+16 或5x-35=-4x-16
x=51或x=19/9
(4) 0.2x²+0.75x=0
4x²+25x=0
x=0或x=-25/4