Evaluate
20
Factor
2^{2}\times 5
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\frac{\left(1\times 3+2\right)\times 12}{3}
Divide \frac{1\times 3+2}{3} by \frac{1}{12} by multiplying \frac{1\times 3+2}{3} by the reciprocal of \frac{1}{12}.
\frac{\left(3+2\right)\times 12}{3}
Multiply 1 and 3 to get 3.
\frac{5\times 12}{3}
Add 3 and 2 to get 5.
\frac{60}{3}
Multiply 5 and 12 to get 60.
20
Divide 60 by 3 to get 20.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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Linear equation
y = 3x + 4
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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
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Limits
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}