Question

PLEASE HELP
Use the Binomial Theorem to find the binomial expansion of the expression.

(x – 3)^5

Answer 1

Do you know the binomial theorem?

Answer 2

no not to clear on it

Answer 3

It's a theorem that enables you to expand expressions like $$(a+b)^n$$ normally we know how to expand these kind of expressions when \[n=2,3\], but for larger n values we can use this theorem.

\[(a+b)^n= \sum \limits_{r=0}^{n}\binom{n}{r}a^rb^{n-r}\]
where,
\[\binom{n}{r}=\frac{n!}{r!(n-r)!}\]

so, just substitute values a,b and n to get your answer.

for more information,
http://en.wikipedia.org/wiki/Binomial_theorem