Important help on the subject of polynomials of binomial arrangement

[issue]

Hi, everyone
It is known that binomial distribution can also be solved by polynomials. i add document with a question I can not solve.

Glad to get for help

Thanks to all the respondents

 

[Evo]

Welcome issue, in order to get help with this it would be better if it was posted in the Homework section, even if it's not actually homework. General Discussion is not the place for it.

You can repost in the proper homework section here https://www.physicsforums.com/#homework-help.260

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