Evaluate
-\frac{\sqrt{3}}{2}+\frac{1}{18}\approx -0.810469848
Factor
\frac{1 - 9 \sqrt{3}}{18} = -0.810469848228883
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\frac{1}{18}-\frac{9\sqrt{3}}{18}
To add or subtract expressions, expand them to make their denominators the same. Least common multiple of 18 and 2 is 18. Multiply \frac{\sqrt{3}}{2} times \frac{9}{9}.
\frac{1-9\sqrt{3}}{18}
Since \frac{1}{18} and \frac{9\sqrt{3}}{18} have the same denominator, subtract them by subtracting their numerators.
Examples
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Limits
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