The first part is trivial. However I cannot seem to use that to write x^4-y^4 in terms of p and q. The expansion from the first part has x^4 and y^4 as terms, no sight of any -y^4.
I also considered starting from x^4 - y^4 and using difference of two squares to break it down, but I always seem to end up with an expression I cannot completely put in terms of p and q.
Am I correct in starting from the expansion, or from the expression x^4 - y^4.
Honestly I think it was supposed to be x^4 + y^4... Allowing you to use the expansion you wrote down earlier.
The same paper already has another misprint in the final question, and the difficulty of the paper itself (and the marks of the question) lend it to being a misprint.
Honestly I think it was supposed to be x^4 + y^4... Allowing you to use the expansion you wrote down earlier.
The same paper already has another misprint in the final question, and the difficulty of the paper itself (and the marks of the question) lend it to being a misprint.