解：4x²-12x+5=0(2x-1)(2x-5)=02x-1=0或2x-5=0x1=1/2 x2=5/2
4X^2-12X+5=0(2X-5)(2X-1)=0X1=5/2 X2=1/2
(2x-5)(2x-1)=0 2x-5=0或2x-1=0 x1=2/5 x2=1/2
