1) x^2-4/x+2 = (x-2)(x+2)/x+2 = x-2
2) x^2-9/x-3= (x-3)(x+3)/x+3 = x-3
3) x^2-4/x-2 = (x-2)(x+2)/x-2 = x+2
4) x^2-16/x+4 = (x-4)(x+4)/x+4 = x-4
5)x^3-1/x-1 = (x-1)(x^2+x+1)/x-1 = x^2+x+1
1) x^2-4/x+2 = (x-2)(x+2)/x+2 = x-2
2) x^2-9/x-3= (x-3)(x+3)/x+3 = x-3
3) x^2-4/x-2 = (x-2)(x+2)/x-2 = x+2
4) x^2-16/x+4 = (x-4)(x+4)/x+4 = x-4
5)x^3-1/x-1 = (x-1)(x^2+x+1)/x-1 = x^2+x+1