Evaluate
9\sqrt{5}+25\approx 45.124611797
Factor
9 \sqrt{5} + 25 = 45.124611797
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\left(\sqrt{5}\right)^{2}+5\sqrt{5}+4\sqrt{5}+20
Apply the distributive property by multiplying each term of \sqrt{5}+4 by each term of \sqrt{5}+5.
5+5\sqrt{5}+4\sqrt{5}+20
The square of \sqrt{5} is 5.
5+9\sqrt{5}+20
Combine 5\sqrt{5} and 4\sqrt{5} to get 9\sqrt{5}.
25+9\sqrt{5}
Add 5 and 20 to get 25.
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