Since \(3\times 3=9\), the square root of \(9\) is \(3\).
\[A=3+\sqrt{80}-9\times 3-\sqrt{80}\]
Simplify \(\sqrt{80}\) to \(4\sqrt{5}\).
\[A=3+4\sqrt{5}-9\times 3-4\sqrt{5}\]
Simplify \(9\times 3\) to \(27\).
\[A=3+4\sqrt{5}-27-4\sqrt{5}\]
Simplify \(3+4\sqrt{5}-27-4\sqrt{5}\) to \(-24\).
\[A=-24\]
A=-24
