posted by nida jabeen .
Find dx at (-5,6) if x2 + y2 =0 2 Marks
What does " 2 Marks dy" have to do with your question?
I assume you want to know dy/dx, the derivative, somewhere.
If x^2 + y^2 = 0, Both x and y must be zero. (-5,6) is not on the curve.
You question does not make sense.