Evaluate
-\frac{5\sqrt{3}}{2}+4\approx -0.330127019
Factor
\frac{8 - 5 \sqrt{3}}{2} = -0.33012701892219276
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2-1\times 5\times \frac{1\sqrt{3}}{2}+2
Multiply 2 and 1 to get 2.
2-5\times \frac{1\sqrt{3}}{2}+2
Multiply 1 and 5 to get 5.
2-\frac{5\times 1\sqrt{3}}{2}+2
Express 5\times \frac{1\sqrt{3}}{2} as a single fraction.
2-\frac{5\sqrt{3}}{2}+2
Multiply 5 and 1 to get 5.
\frac{2\times 2}{2}-\frac{5\sqrt{3}}{2}+2
To add or subtract expressions, expand them to make their denominators the same. Multiply 2 times \frac{2}{2}.
\frac{2\times 2-5\sqrt{3}}{2}+2
Since \frac{2\times 2}{2} and \frac{5\sqrt{3}}{2} have the same denominator, subtract them by subtracting their numerators.
\frac{4-5\sqrt{3}}{2}+2
Do the multiplications in 2\times 2-5\sqrt{3}.
\frac{4-5\sqrt{3}}{2}+\frac{2\times 2}{2}
To add or subtract expressions, expand them to make their denominators the same. Multiply 2 times \frac{2}{2}.
\frac{4-5\sqrt{3}+2\times 2}{2}
Since \frac{4-5\sqrt{3}}{2} and \frac{2\times 2}{2} have the same denominator, add them by adding their numerators.
\frac{4-5\sqrt{3}+4}{2}
Do the multiplications in 4-5\sqrt{3}+2\times 2.
\frac{8-5\sqrt{3}}{2}
Do the calculations in 4-5\sqrt{3}+4.
Examples
Quadratic equation
{ x } ^ { 2 } - 4 x - 5 = 0
Trigonometry
4 \sin \theta \cos \theta = 2 \sin \theta
Linear equation
y = 3x + 4
Arithmetic
699 * 533
Matrix
\left[ \begin{array} { l l } { 2 } & { 3 } \\ { 5 } & { 4 } \end{array} \right] \left[ \begin{array} { l l l } { 2 } & { 0 } & { 3 } \\ { -1 } & { 1 } & { 5 } \end{array} \right]
Simultaneous equation
\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
Differentiation
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Limits
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}