What is the foci 9x^2-4y^2-72x=0 ?

The foci 9x^2-4y^2-72x=0 is (4+2sqrt(13),0),(4-2sqrt(13),0)

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foci 9x^2-4y^2-72x=0

foci

(4 + 213, 0), (4 - 213, 0)

Solution steps

(h + c, k), (h - c, k)

Calculate Hyperbola properties

9 x^{2} - 4 y^{2} - 72 x = 0 :

Right-left Hyperbola with

(h, k) = (4, 0), a = 4, b = 6

(4 + c, 0), (4 - c, 0)

Compute

c :

c = 4^{2} + 6^{2} : 213

(4 + 213, 0), (4 - 213, 0)

What is the foci 9x^2-4y^2-72x=0 ?
The foci 9x^2-4y^2-72x=0 is (4+2sqrt(13),0),(4-2sqrt(13),0)