Question

use the binomial theorem to find the binomial expansion of expression
(x-3)^5

Answer 1

well binomial theorem says

\[(a+b)^n = \sum_{k=0}^{n} \left(\begin{matrix}n \\ k\end{matrix}\right) (a)^{n - k} (b)^k\]

so you have a = x, b = -3 and n = 5

you can substitute them and calculate

Answer 2

http://lmgtfy.com/?q=online+binomial+theorem+calculator