Evaluate
-\frac{21}{4}=-5.25
Factor
-\frac{21}{4} = -5\frac{1}{4} = -5.25
Share
Copied to clipboard
\frac{7\left(-1\right)\left(-3\right)^{2}\times \frac{1}{2}}{6}
Calculate -1 to the power of 3 and get -1.
\frac{-7\left(-3\right)^{2}\times \frac{1}{2}}{6}
Multiply 7 and -1 to get -7.
\frac{-7\times 9\times \frac{1}{2}}{6}
Calculate -3 to the power of 2 and get 9.
\frac{-63\times \frac{1}{2}}{6}
Multiply -7 and 9 to get -63.
\frac{\frac{-63}{2}}{6}
Multiply -63 and \frac{1}{2} to get \frac{-63}{2}.
\frac{-\frac{63}{2}}{6}
Fraction \frac{-63}{2} can be rewritten as -\frac{63}{2} by extracting the negative sign.
\frac{-63}{2\times 6}
Express \frac{-\frac{63}{2}}{6} as a single fraction.
\frac{-63}{12}
Multiply 2 and 6 to get 12.
-\frac{21}{4}
Reduce the fraction \frac{-63}{12} to lowest terms by extracting and canceling out 3.
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}