(1)x-3=x(x-3)解:x-3-x(x-3)=0(1-x)(x-3)=01-x=0,x-3=0x1=1,x2=3;(2)x2?2 2 x+1=0解:x2-2 2 x+2=-1+2(x- 2 )2=1x- 2 =±1x- 2 =1,x- 2 =-1x1=1+ 2 ,x2=-1+ 2 ;(3)3x2-5x=2解:3x2-5x-2=0x=5±