What is the foci ((y)^2)/(121)-((x)^2)/(81)=1 ?

The foci ((y)^2)/(121)-((x)^2)/(81)=1 is (0,sqrt(202)),(0,-sqrt(202))

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foci ((y)^2)/(121)-((x)^2)/(81)=1

foci

(0, 202), (0, - 202)

Solution steps

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

Calculate Hyperbola properties

\frac{y ^{2}}{121} - \frac{x ^{2}}{81} = 1 :

Up-down Hyperbola with

(h, k) = (0, 0), a = 11, b = 9

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

Compute

c :

c = 1 1^{2} + 9^{2} : 202

(0, 0 + 202), (0, 0 - 202)

Refine

(0, 202), (0, - 202)

What is the foci ((y)^2)/(121)-((x)^2)/(81)=1 ?
The foci ((y)^2)/(121)-((x)^2)/(81)=1 is (0,sqrt(202)),(0,-sqrt(202))