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**1. Homework Statement**

Solve xy' + 2y = sqrt(1 + x^2)

**2. Homework Equations**

I got an integrating factor of [itex]x^2[/itex]

So [tex]y = 1/x^2 \int{x\sqrt{1 + x^2}}[/tex]

**3. The Attempt at a Solution**

and I get [tex]y =\frac{(1 + x^2)^{3/2}}{3x^2}[/tex] for C = 0

But this wrong when I substitute it in ... what'd I do wrong?

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