Evaluate
\frac{5\left(\sqrt{5}+\sqrt{7}\right)}{2}\approx 12.204548221
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\frac{4+1}{2}\left(\sqrt{7}+\sqrt{5}\right)
Multiply 2 and 2 to get 4.
\frac{5}{2}\left(\sqrt{7}+\sqrt{5}\right)
Add 4 and 1 to get 5.
\frac{5}{2}\sqrt{7}+\frac{5}{2}\sqrt{5}
Use the distributive property to multiply \frac{5}{2} by \sqrt{7}+\sqrt{5}.
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