## College Algebra (10th Edition)

The domain of h(x) is {${ x|x\ne2,x\ne-2}$}.
$h(x)=\frac{2x}{x^2-4}$ To find the domain of a rational function, we must set the denominator equal to 0 and solve for x. $x^2-4=0$ $x^2=4$ $x=\pm2$ This means that the domain is: {${ x|x\ne2,x\ne-2}$}