how to do exponets

You did do good rarinstraw1195 BUT  

h could also equal -11

$h^2=121\\ h=\pm\sqrt{121}\\ h=\pm \;11$

To figure out what h is, you would do the opposite of squaring. The opposite of squaring is square rooting, so you would square root both sides, giving you h=11.

Did I do good mods? 

Right! Totally forgot! Thanks Melody!