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Without changing the direction of the axes, the origin is transferred to the point (2, 3). Then the equation `x^(2)-y^(2)-4x-6y+9=0` changes to

A

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

B

`x^(2) + y^(2)= 4`

C

`x^(2) + y^(2)- 8x- 12y+ 48= 0`

D

`x^(2)+y^(2)= 9`

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