Tracey is right with her answer, barring the "always" statement regarding rational and irrational. There is an exception, and that would be Pi squared, which remains irrational.)
At first glance, I thought the test makers had it wrong, (the mathematical sentence is correct) when I saw her next comment was wrong, which I would call a trick question because only half of the problem is wonky. And of course, the commenters on the blog where this was posted LOL'd about "hahaha, women and math = fail!" and then continued to comment on how the actual MATH was wrong.
(1.4142135623730950488016887242097 + 2.8284271297461900976033774484194)2 = 18. :D
HEY TEENAGE BOY:
Love, former FEMALE vice-president of Mu Alpha Theta.