Evaluate: `intsqrt(3-2x-x^2)\ dx`

Explanation

`int sqrt{3-2 x-x^{2}} d x `
`
=int sqrt{3-(2 x+x^{2})} d x`


Adding and Subtracting `1^{2}`
`

=int sqrt{3-(x^{2}+2 x+1^{2}-1^{2})} d x `
`
=int sqrt{3-(x^{2}+2 x+1^{2})+1} d x `
`
=int sqrt{3+1-(x^{2}+2 x+1^{2})} d x `
`
...