Question

How wld u find \( (a+2b)^4 \)

Answer 1

The 2b is throwing me off here

Answer 2

how so?

Answer 3

what are you asked to do... expand...

Answer 4

you want to expand it?

Answer 5

ya using binomail theorem

Answer 6

you can just substitute another variable for 2b and plug 2b into the final expansion:

\[(a+c)^{4}\] where c = 2b

Answer 7

ya ok thanks

Answer 8

the coefficients will be

1 4 6 4 1

so its 1a^4 + 4a^3(2b) + 6a^2(2b)^2 + 4a(2b)^3 + (2b)^4

Answer 9

http://www.purplemath.com/modules/binomial.htm
great stuff

Answer 10

oh yay. I like that link