Question

Which is a perfect square?

Answer 1

6

Explanation:

`√(a)=b\iff b^2=a\ for\ a\geq0\ and\ b\geq0\\\\\\\sqrt5-not\ rational\\\\\sqrt8-not\ rational\\\\√(36)=6-rational\qquad(√(36)=6\ because\ 6^2=36)\\\\√(44)-not\ rational`

Answer 2

36

Explanation:

The only number that is a perfect square is 36

6*6 = 36