Simplify \(\sqrt{20}\) to \(2\sqrt{5}\).
\[3\times 2\sqrt{5}+\sqrt{28}+\sqrt{45}-\sqrt{63}\]
Simplify \(\sqrt{28}\) to \(2\sqrt{7}\).
\[3\times 2\sqrt{5}+2\sqrt{7}+\sqrt{45}-\sqrt{63}\]
Simplify \(\sqrt{45}\) to \(3\sqrt{5}\).
\[3\times 2\sqrt{5}+2\sqrt{7}+3\sqrt{5}-\sqrt{63}\]
Simplify \(\sqrt{63}\) to \(3\sqrt{7}\).
\[3\times 2\sqrt{5}+2\sqrt{7}+3\sqrt{5}-3\sqrt{7}\]
Simplify \(3\times 2\sqrt{5}\) to \(6\sqrt{5}\).
\[6\sqrt{5}+2\sqrt{7}+3\sqrt{5}-3\sqrt{7}\]
Collect like terms.
\[(6\sqrt{5}+3\sqrt{5})+(2\sqrt{7}-3\sqrt{7})\]
Simplify.
\[9\sqrt{5}-\sqrt{7}\]
Decimal Form: 17.478860
9*sqrt(5)-sqrt(7)
