Evaluate
\left(m-n\right)\left(m+4n\right)
Expand
m^{2}+3mn-4n^{2}
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m^{2}+3mn-10n^{2}+6n^{2}
Use the distributive property to multiply m+5n by m-2n and combine like terms.
m^{2}+3mn-4n^{2}
Combine -10n^{2} and 6n^{2} to get -4n^{2}.
m^{2}+3mn-10n^{2}+6n^{2}
Use the distributive property to multiply m+5n by m-2n and combine like terms.
m^{2}+3mn-4n^{2}
Combine -10n^{2} and 6n^{2} to get -4n^{2}.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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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.
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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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