($\displaystyle \sqrt{h^2+1}$+1) ($\displaystyle \sqrt{h^2+1}$+1)
THis is my answer? h^{2}+2+2($\displaystyle \sqrt{h^2+1}$)
Hello, zbest1966!
$\displaystyle \text{Multiply: }\:(\sqrt{h^2+1}+1) (\sqrt{h^2+1}+1)$
$\displaystyle \text{This is my answer: }\:h^2+2+2\sqrt{h^2+1}$
You are correct!
By the way, you don't have to jump in and out of LaTeX for these expressions.