Evaluate
\frac{13\sqrt{5}}{6}\approx 4.844813951
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\frac{4}{3}\sqrt{5}+\frac{5}{6}\sqrt{5}
Combine 2\sqrt{5} and -\frac{2}{3}\sqrt{5} to get \frac{4}{3}\sqrt{5}.
\frac{13}{6}\sqrt{5}
Combine \frac{4}{3}\sqrt{5} and \frac{5}{6}\sqrt{5} to get \frac{13}{6}\sqrt{5}.
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