How do I perform Implicit Differentiation in MathCad?

I am trying to use MathCad to solve an implicit differentiation but I have no idea how I could do it. It seems to only solve a normal differentiation with only one variable.

I defined this...
f(x, y) := x^2 + y^2

and then differentiated it with respect to x but I get...
d(f(x, y)) / dx -> x^2

I thought I should expect..
d(f(x, y)) / dx -> x^2 + 2y(dy/dx)

How do I get MathCad to work properly with implicit differentiation?
Thanks!

Hi

Not sure if this will help you.

Thanks! The article tells me exactly what I need. :D
Thanks a lot!

Also, I just realise I had a typo in my previous post. :P

Quote:

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and then differentiated it with respect to x but I get...
d(f(x, y)) / dx -> 2x

I thought I should expect..
d(f(x, y)) / dx -> 2x + 2y(dy/dx)

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