I just got started on this, and am not grasping the WHOLE idea.
1.xy=25 The answer says -y/x
2.x^2+3xy+y^2=15 And this says -y^2/x^2
1. dy/dx(xy)= dy/dx(25)
2.dy/dx x^2+3xy+y^2= dy/dx 15
The Attempt at a Solution
2. -2x-3/y (which i know is not right.)