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The solution of the differential equatio...

The solution of the differential equation `xdy + (x+y) dx=0` is

A

`x^2 +y^2 =0`

B

`2x^2 +y^2 =0`

C

`x^2 +2xy =c`

D

`y^2 +2xy =c`

Text Solution

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The correct Answer is:
C
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