What is the domain of y=(x^2-9)/(x^2-7x+12) ?

The domain of y=(x^2-9)/(x^2-7x+12) is x 4

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domain of y=(x^2-9)/(x^2-7x+12)

domain

y = \frac{x ^{2} - 9}{x ^{2} - 7 x + 12}

x < 3 or 3 < x < 4 or x > 4

Interval Notation

(- \infty, 3) \cup (3, 4) \cup (4, \infty)

Solution steps

Find undefined (singularity) points:

x = 4, x = 3

The function domain

x < 3 or 3 < x < 4 or x > 4

What is the domain of y=(x^2-9)/(x^2-7x+12) ?
The domain of y=(x^2-9)/(x^2-7x+12) is x<3\lor 3<x<4\lor x>4