Evaluate
-21
Factor
-21
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\frac{9\left(-7\right)}{3}
Express 9\left(-\frac{7}{3}\right) as a single fraction.
\frac{-63}{3}
Multiply 9 and -7 to get -63.
-21
Divide -63 by 3 to get -21.
Examples
Quadratic equation
{ x } ^ { 2 } - 4 x - 5 = 0
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Matrix
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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
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Limits
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