Evaluate
\frac{28}{55}\approx 0.509090909
Factor
\frac{2 ^ {2} \cdot 7}{5 \cdot 11} = 0.509090909090909
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-7\left(-\frac{4}{55}\right)
Fraction \frac{-4}{55} can be rewritten as -\frac{4}{55} by extracting the negative sign.
\frac{-7\left(-4\right)}{55}
Express -7\left(-\frac{4}{55}\right) as a single fraction.
\frac{28}{55}
Multiply -7 and -4 to get 28.
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
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