Evaluate
4\left(\sqrt{5}+2\right)\approx 16.94427191
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\left(\sqrt{5}\right)^{2}+3\sqrt{5}+\sqrt{5}+3
Apply the distributive property by multiplying each term of \sqrt{5}+1 by each term of \sqrt{5}+3.
5+3\sqrt{5}+\sqrt{5}+3
The square of \sqrt{5} is 5.
5+4\sqrt{5}+3
Combine 3\sqrt{5} and \sqrt{5} to get 4\sqrt{5}.
8+4\sqrt{5}
Add 5 and 3 to get 8.
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