Hi, I am from Poland so please forgive my english.
I seem to have problems solving the following assignment (translated)
"There are polynomials:
P(x) = (2x+1)^3
Q(x) = 8x+a
R(x) = 4x^2-1
S(x) = 8x^2 + cx
What a and c is required for P(x) + Q(x) - 3R(x) = S(x)?"
After many conversions, I came up with this:
(2x+1)^3 + a = 12x^2 - 3 + cx
But after that I have no idea what next, plus I may not even be heading the right direction... help?