Evaluate
-\sqrt{5}-3\approx -5.236067977
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2+\sqrt{5}-2\sqrt{5}-\left(\sqrt{5}\right)^{2}
Apply the distributive property by multiplying each term of 1-\sqrt{5} by each term of 2+\sqrt{5}.
2-\sqrt{5}-\left(\sqrt{5}\right)^{2}
Combine \sqrt{5} and -2\sqrt{5} to get -\sqrt{5}.
2-\sqrt{5}-5
The square of \sqrt{5} is 5.
-3-\sqrt{5}
Subtract 5 from 2 to get -3.
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