Simplify \(\sqrt{45}\) to \(3\sqrt{5}\).
\[\sqrt{20-3\sqrt{5}\sqrt{5}}\]
Simplify \(3\sqrt{5}\sqrt{5}\) to \(3\sqrt{5\times 5}\).
\[\sqrt{20-3\sqrt{5\times 5}}\]
Simplify \(5\times 5\) to \(25\).
\[\sqrt{20-3\sqrt{25}}\]
Since \(5\times 5=25\), the square root of \(25\) is \(5\).
\[\sqrt{20-3\times 5}\]
Simplify \(3\times 5\) to \(15\).
\[\sqrt{20-15}\]
Simplify \(20-15\) to \(5\).
\[\sqrt{5}\]
Decimal Form: 2.236068
sqrt(5)
