We have only been taught how to do single bracket expansions, so this is my first bracket one, so please can you tell me if Ive done anything wrong?
P.S I dont know how to use the factorial method so Im using pascal's triangle. If anyone has any helpful points on the factorial method, please tell me
Ok:
1)
^5 + 5(1)^4(x)1 + 10(1)^3(x)^2 + 10(1)^2(x)^3 + 5(1)^1(x)^4 + 1(x)^5)
Equals:
2) Multiply by first bracket:
(1) + (2+x)(5x) + (2+x)(10x^2) + (2+x)(10x^3) + (2+x)(5x^4) + (2+x))x^5))
Equals:
 + (\textcolor{red}{10x}+5x^2) + (20x^2+10x^3) + (20x^3+10x^4) + (10x^4+5x^5) + (10x^5+x^6))
Note: put in brackets to make it easier to read.
3) Put in order up to
....
I got the above answer, however the book's answers got
and I cannot find the extra
that I am missing
I am guessing the method that I used is correct or not? and how would this question be done using the
and
button on my calculator?
Thankyou very much!
LinkBack URL
About LinkBacks
 (1 + x)^5)
Originally Posted by fishkeeper 
