## Precalculus: Mathematics for Calculus, 7th Edition

$h^{2}$
Change square roots to exponents: $((h^{2}+1)^{1/2}+1)((h^{2}+1)^{1/2}-1)$ Multiply: $(h^{2}+1)^{2/2}-1$ Simplify: $h^{2}+1-1$ $h^{2}$