Evaluate
79.28
Factor
\frac{2 \cdot 991}{5 ^ {2}} = 79\frac{7}{25} = 79.28
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\frac{611.2+81.2\times 12}{20}
Multiply 76.4 and 8 to get 611.2.
\frac{611.2+974.4}{20}
Multiply 81.2 and 12 to get 974.4.
\frac{1585.6}{20}
Add 611.2 and 974.4 to get 1585.6.
\frac{15856}{200}
Expand \frac{1585.6}{20} by multiplying both numerator and the denominator by 10.
\frac{1982}{25}
Reduce the fraction \frac{15856}{200} to lowest terms by extracting and canceling out 8.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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4 \sin \theta \cos \theta = 2 \sin \theta
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y = 3x + 4
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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}