# Homework Help: Integrating xy

1. Nov 6, 2008

### BJducky

1. The problem statement, all variables and given/known data
It is simple: find the antiderivative of 2xy.

2. Relevant equations

3. The attempt at a solution
I am inclined to say that it equals (xy)^2 +c, but can't help but feel i have left out something.

2. Nov 6, 2008

### rock.freak667

What are you integrating with respect to? Are both x and y variables?

3. Nov 6, 2008

### BJducky

Yes, they are both variables.

4. Nov 7, 2008

### HallsofIvy

Then answer the question! You want to find the anti-derivative with respect to which variable?

$$\int 2xy dx= x^2y+ C$$

$$\int 2xy dy= xy^2+ C$$

Choose one!