(1)y2+2y-3=0,(y+3)(y-1)=0, y+3=0,y-1=0, y1=-3,y2=1; (2)4x2+x-5=0,(4x+5)(x-1)=0, 4x+5=0,x-1=0, x1=-5 4 ,x2=1; (3)2x2-5x-7=0,(2x-7)(x+1)=0, 2x-7=0,x+1=0, x1=3.5,x2=-1; (4)4x2-3x=0, x(4x-3)=0, x=0,4x-3=0, x1=0,x2=3 4 ; (5)3(x+1)2=3.63,(x+1)2=1.21, x+1=±1.1, x1=0.1,x2=-2.1; (6)x2-6x+9=(5-2x)2,(x-3)2=(5-2x)2, x-3=±(5-2x), x1=8 3 ,x2=2.