What is the domain of y=(x-5)/(x^2-9) ?

The domain of y=(x-5)/(x^2-9) is x 3

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domain of y=(x-5)/(x^2-9)

domain

y = \frac{x - 5}{x ^{2} - 9}

x < - 3 or - 3 < x < 3 or x > 3

Interval Notation

(- \infty, - 3) \cup (- 3, 3) \cup (3, \infty)

Solution steps

Find undefined (singularity) points:

x = 3, x = - 3

The function domain

x < - 3 or - 3 < x < 3 or x > 3

f (x) = \frac{6}{x ^{2} - 21 x + 98}

f (x) = \frac{x + 3}{x + 4}

16 - 2 x - x^{2}

e^{- 7 x}

f (x) = x^{3} - 5

What is the domain of y=(x-5)/(x^2-9) ?
The domain of y=(x-5)/(x^2-9) is x<-3\lor-3<x<3\lor x>3