Evaluate
28.9
Factor
\frac{17 ^ {2}}{2 \cdot 5} = 28\frac{9}{10} = 28.9
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\left(4.62+3.28\right)\times 9.2-43.78
Multiply 8.4 and 0.55 to get 4.62.
7.9\times 9.2-43.78
Add 4.62 and 3.28 to get 7.9.
72.68-43.78
Multiply 7.9 and 9.2 to get 72.68.
28.9
Subtract 43.78 from 72.68 to get 28.9.
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}