# Math Help - Polynomials (expand the formula)

1. ## Polynomials (expand the formula)

I'm using the Charles P. McKeague "Algebra with trigonometry for College Students" (Second Edition)

1. you multiplied by 100 4 times.

2. you didn't use the binomial theorem to expand the binomial

Using the expansion you should get.
$(1+r)^4 = 1 + 4r + 6r^2 + 4r^3 + r^4$

may be worth reading over your books notes on the binomial expansion.

Let us know if you have any further problems.

bobak