(solved)binomial coefficients/Pascal triangle shortcut with a negative?

I am learning how to expand binomial coefficients using Pascal's Triangle.

All the examples I see are when 'a' and 'b' are positive. What is the trick in terms of signs when either 'a' or 'b' is negative?

Re: binomial coefficients/Pascal triangle shortcut with a negative?

Quote:

Originally Posted by

**delgeezee** I am learning how to expand binomial coefficients using Pascal's Triangle.

All the examples I see are when 'a' and 'b' are positive. What is the trick in terms of signs when either 'a' or 'b' is negative?

Here is an example.

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Re: binomial coefficients/Pascal triangle shortcut with a negative?

Quote:

Originally Posted by

**Plato** Here is an example.

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Thanks, that makes sense!