pascal's triangle / expanding polynomial

(ax+b)^n

how do you expand that using pascal's triangle?

i'm aware of the binomial theorem, but i've seen some questions relating to this too...


Thanks

my class is just doing in internal assessment on a similar thing...

anyway:
(ax + b) ^ n

= sum(i = 0 to n): (ax)ⁱ * b^{n - i} * ⁿC_i

where ⁿC_i is the combination formula =
n!
-----
i!(n-i)!

which also happens to be the pascal's triangle number, nth row (starting from 0), ith column (starting from zero)

thanks very much

it's the coefficients!