Find the point to which the origin should be shifted so that the equation `y^2-6y-4x+13=0` is transformed to the form `y^2+A x=0.`

Explanation

`y^2+Ax=0`

`y^2-6y+(3^2-3^2)-4x+13=0`

`(y-3)^2+4-4x=0`

`(y-3)^2+4(1-x)=0`

`(y-3)^2-4(x-1)=0`

`y^2+Ax=0`

`A=-4`.
`y-3=0`

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