Factor
\left(5-a\right)\left(L-2m\right)
Evaluate
\left(5-a\right)\left(L-2m\right)
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5\left(-2m+L\right)-a\left(-2m+L\right)
Do the grouping 5L-10m-aL+2am=\left(5L-10m\right)+\left(-aL+2am\right), and factor out 5 in the first and -a in the second group.
\left(-2m+L\right)\left(5-a\right)
Factor out common term -2m+L by using distributive property.
Examples
Quadratic equation
{ x } ^ { 2 } - 4 x - 5 = 0
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4 \sin \theta \cos \theta = 2 \sin \theta
Linear equation
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}