Recent content by babby

OK, I understand that part now, but I have another question: Can somebody explain to me why equating coefficients work? Example: 8x^3+13x = Ax^3 + 2Ax + Bx^2 + 2B + Cx + D expanded into: 8x^3 + 13x = Ax^3 + Bx^2 + (2A+C)x + 2(B+D) where A,B,C,D are constants. Why does 8 = A; 0 = B; 13 = 2A...

Ah, that was what I was originally thinking, but forgot the variable. But is there a reason why you have to repeat the function when doing it the other way? I don't understand how it works. Is it because the first part of the function: B/(x-2) eliminates the need for a numerator with one degree...

I have a few questions about decomposing partial fractions. I know how to solve these problems, but I just don't understand why I'm doing some of the things. 1. Why does equating coefficients work? I don't understand the idea behind it. 2. When you are decomposing fractions into constants...