- 2,8 \cdot ( - 1 \frac { 1 } { 7 } )
Evaluate
3,2
Factor
\frac{2 ^ {4}}{5} = 3\frac{1}{5} = 3.2
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-2,8\left(-\frac{7+1}{7}\right)
Multiply 1 and 7 to get 7.
-2,8\left(-\frac{8}{7}\right)
Add 7 and 1 to get 8.
-\frac{14}{5}\left(-\frac{8}{7}\right)
Convert decimal number -2,8 to fraction -\frac{28}{10}. Reduce the fraction -\frac{28}{10} to lowest terms by extracting and canceling out 2.
\frac{-14\left(-8\right)}{5\times 7}
Multiply -\frac{14}{5} times -\frac{8}{7} by multiplying numerator times numerator and denominator times denominator.
\frac{112}{35}
Do the multiplications in the fraction \frac{-14\left(-8\right)}{5\times 7}.
\frac{16}{5}
Reduce the fraction \frac{112}{35} to lowest terms by extracting and canceling out 7.
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}