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The focus of the rectangular hyperbola (...

The focus of the rectangular hyperbola `(x + 4) (y-4) = 16` is

A

`(-4 + 4 sqrt2, 4 - 4 sqrt2)`

B

`(-4-4 sqrt2, 4 + 4 sqrt2)`

C

`(-4 + 4sqrt2, 4 + 4sqrt2)`

D

none of these

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The correct Answer is:
C
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