( 2 - ( \sqrt { 5 } - 1 ) + ( 2 \sqrt { 5 } - 1 )
Evaluate
\sqrt{5}+2\approx 4.236067977
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2-\sqrt{5}-\left(-1\right)+2\sqrt{5}-1
To find the opposite of \sqrt{5}-1, find the opposite of each term.
2-\sqrt{5}+1+2\sqrt{5}-1
The opposite of -1 is 1.
3-\sqrt{5}+2\sqrt{5}-1
Add 2 and 1 to get 3.
3+\sqrt{5}-1
Combine -\sqrt{5} and 2\sqrt{5} to get \sqrt{5}.
2+\sqrt{5}
Subtract 1 from 3 to get 2.
Examples
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Matrix
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\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
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Limits
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