Answer
$x+2$ and $x-24$
Work Step by Step
The area of a rectangle is
$\text{Area}=\text{Length}\cdot\text{Width}$
We factor the area:
$x^2-22x-48=x^2+2x-24x-48$
$=x(x+2)-24(x+2)$
$=(x+2)(x-24)$
The possible dimensions are $x+2$ and $x-24$.