Engineering Board Exam Reviewer · Variable Separable Equations · easy

Solve: y,dy+x,dx=0

1. x2+y2=C
2. y2-x2=C
3. xy=C
4. x+y=C

Answer

A. x2+y2=C

Solution

Integrating: y2/2+x2/2=C1 x2+y2=C.

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