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## Homework Statement

[tex](x+2y-4)\,dx - (2x-4y)\,dy=0[/tex]

## The Attempt at a Solution

My answer,

[tex]\mathrm{ln}[4(y-1)^2+(x-2)^2] + 2\mathrm{arctan}\frac{x-2}{2y-2}=C[/tex]

Textbook's answer,

[tex]\mathrm{ln}[4(y-1)^2+(x-2)^2] - 2\mathrm{arctan}\frac{2y-2}{x-2}=C[/tex]

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