diff-equation

Question: The general solution of the differential equation $(2x-y+1)dx+(2y-x+1)dy=0$ is



1) ${{x}^{2}}+{{y}^{2}}+xy-x+y=c$
2) ${{x}^{2}}+{{y}^{2}}-xy+x+y=c$
3) ${{x}^{2}}-{{y}^{2}}+2xy-x+y=c$
4) ${{x}^{2}}-{{y}^{2}}-2xy+x-y=c$
Solution: Explanation: No Explanation
Homogeneous differential equations

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