Evaluate
\frac{31}{28}\approx 1.107142857
Factor
\frac{31}{2 ^ {2} \cdot 7} = 1\frac{3}{28} = 1.1071428571428572
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\frac{-30-1}{\left(-5\right)^{2}-2\left(-5\right)-63}
Multiply 6 and -5 to get -30.
\frac{-31}{\left(-5\right)^{2}-2\left(-5\right)-63}
Subtract 1 from -30 to get -31.
\frac{-31}{25-2\left(-5\right)-63}
Calculate -5 to the power of 2 and get 25.
\frac{-31}{25-\left(-10\right)-63}
Multiply 2 and -5 to get -10.
\frac{-31}{25+10-63}
The opposite of -10 is 10.
\frac{-31}{35-63}
Add 25 and 10 to get 35.
\frac{-31}{-28}
Subtract 63 from 35 to get -28.
\frac{31}{28}
Fraction \frac{-31}{-28} can be simplified to \frac{31}{28} by removing the negative sign from both the numerator and the denominator.
Examples
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{ 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}