Tìm x

1)x(2x-3)-x^2+2=x(x-5)-1
2)(x-1)(x+3)=x^2-4
3)(x-3)(x-5)=(x-3)(x-4)
4)(6x+2)(x-2)=2x(3x-5)
5)(x-2)^2=(x-3)(x+2)
6)(x-1)(x+3)-(+2)(x-3)=0