(1)方程整理为x2-4x-5=0,即(x-5)(x+1)=0,可得x-5=0或x+1=0,解得:x1=5,x2=-1;(2)(y-3)2=6-2y(3-y)2=2(3-y)∴(3-y)(1-y)=0,解得:y1=3,y2=1.