Evaluate
-40
Factor
-40
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20\left(1-2\right)\left(62-2\times 30\right)
Multiply 5 and 4 to get 20.
20\left(-1\right)\left(62-2\times 30\right)
Subtract 2 from 1 to get -1.
-20\left(62-2\times 30\right)
Multiply 20 and -1 to get -20.
-20\left(62-60\right)
Multiply 2 and 30 to get 60.
-20\times 2
Subtract 60 from 62 to get 2.
-40
Multiply -20 and 2 to get -40.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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y = 3x + 4
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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}