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**Jnorman223** I need to prove the standard formula of a hyperbola centered at (h,k). I can complete the proof for a hyperbola centered at (0,0) with no trouble, but I have had no success when the center is moved to (h,k). I am not sure if I am missing some substitution along the way or if my algebra is just wrong or what but it never comes out correctly. Any help or insight regarding the methods you would use or the steps you would follow would be greatly appreciated. Thank you.