Evaluate
-420
Factor
-420
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\frac{-21\left(-40\right)}{-2}
Multiply -3 and 7 to get -21.
\frac{840}{-2}
Multiply -21 and -40 to get 840.
-420
Divide 840 by -2 to get -420.
Examples
Quadratic equation
{ x } ^ { 2 } - 4 x - 5 = 0
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Matrix
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Simultaneous equation
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\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
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Limits
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