Tìm x

1,x(x-1)(x+1)(x+2)-3
2,(x+2)(x+3)(x-7)(x-8)-144
3,(x-7)(x-5)(x-4)(x-2)-72
4,(x^2+8x+12)(x^2+12x+32)+16
5,(x^2+6x+8)(x^2+8x+15)-24