###### Exercise33

Simplify the radical expression or state that it is `not a real number`

.

\(\displaystyle{\sqrt{169}-\sqrt{25}=}\)

\(\displaystyle{\sqrt{169-25}=}\)

Simplify the radical expression or state that it is `not a real number`

.

\(\displaystyle{\sqrt{169}-\sqrt{25}=}\)

\(\displaystyle{\sqrt{169-25}=}\)