You probably know that for two commutative quantities x and y,we have:(adsbygoogle = window.adsbygoogle || []).push({});

[itex] (x+y)^n=\sum_{r=0}^n \left( \begin{array}{c} n \\ r \end{array} \right) x^{n-r} y^r [/itex]

Now I wanna know is there a similiar formula for the case when x and y don't commute and we have [itex] [x,y]=c [/itex] and [itex] [x,c]=[y,c]=0 [/itex]?

Thanks

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# Newton's expansion for non-commutative quantities

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