Originally Posted by

**padawan443** Hey math wizards,

I'm in calc2 and doing partial fractions. I get that the general idea of partial fractions is to split one fraction into one or more by:

1.Fixing improper fractions (if necessary)

2. factoring the denominator

3. Substitute for ABCD (as necessary)

4. plug in convenient x values to solve for variables

5. plug in solved variables to solve for leftovers

I'm probably missing something above but I am not sure exactly how to do step 3. For example I have these problem:

a) 7x^2 +3x -3 / x^3 +x^2 and b) x^2 / x^4 -42x^2- 343

would a) numerator look like Ax^2 +Bx - C? would b) look like Ax + Ax^2? What are the general rules for setting these variables up?