Evaluate
15.72
Factor
\frac{3 \cdot 131}{5 ^ {2}} = 15\frac{18}{25} = 15.72
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1.44-4\times 1.7\left(-2.1\right)
Calculate -1.2 to the power of 2 and get 1.44.
1.44-6.8\left(-2.1\right)
Multiply 4 and 1.7 to get 6.8.
1.44-\left(-14.28\right)
Multiply 6.8 and -2.1 to get -14.28.
1.44+14.28
The opposite of -14.28 is 14.28.
15.72
Add 1.44 and 14.28 to get 15.72.
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}