Question

what is the expansion of (a+2b)^4

Answer 1

have you tried pascal's triangle or binomial expansion theorem?

Answer 2

I dont really understand the pascal triangle.

Answer 3

use \(\huge (a+b)^2=a^2+2ab+b^2\) twice
first use :
((a+2b)^2 )^2
solve inner bracket first:
so what is (a+2b)^2 ?

Answer 4

a^2+4b+4b2

Answer 5

the 2nd term is not 4b, its ?