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



This Question is Closed

swissgirl
Best Response
You've already chosen the best response.
0
The 2b is throwing me off here

panlac01
Best Response
You've already chosen the best response.
0
how so?

campbell_st
Best Response
You've already chosen the best response.
0
what are you asked to do... expand...

sami21
Best Response
You've already chosen the best response.
0
you want to expand it?

swissgirl
Best Response
You've already chosen the best response.
0
ya using binomail theorem

dpflan
Best Response
You've already chosen the best response.
1
you can just substitute another variable for 2b and plug 2b into the final expansion:
\[(a+c)^{4}\] where c = 2b

swissgirl
Best Response
You've already chosen the best response.
0
ya ok thanks

campbell_st
Best Response
You've already chosen the best response.
0
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


swissgirl
Best Response
You've already chosen the best response.
0
oh yay. I like that link