lim (x→2 )(x^4-16)/(x-2) =lim (x→2 )(x^2+4)(x^2-4)/(x-2) =lim (x→2 )(x^2+4)(x+2)(x-2)/(x-2)=lim (x→2 )(x^2+4)(x+2)=lim (x→2 )(2^2+4)(2+2)=32
