# Partial differential - difference of opinion

1. Sep 23, 2014

### Roodles01

I have a difference of opinion with 2 calculation engines.

equation to solve is;
d/dx (a(x^2 +y)

Wolframalpha of course is a very trusted source but I also use symbolab.
Here is a screenshot of the differential I want from both sites and associated answers.

. . . and the wolfram solution

could anyone please confirm which is correct.
Personally I like the symbolab solution.

2. Sep 23, 2014

### ShayanJ

The point is, wolfram assumed you mean a is a function and its argument is $x^2+y$. You should have written a*(x^2+y).

3. Sep 23, 2014

### Roodles01

oops sorry. Just me being lazy

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