What is the domain of f(x)=x^2-9 ?

The domain of f(x)=x^2-9 is -infinity <x<infinity

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domain of f(x)=x^2-9

domain

f (x) = x^{2} - 9

- \infty < x < \infty

Interval Notation

(- \infty, \infty)

Solution steps

The function has no undefined points nor domain constraints. Therefore, the domain is

- \infty < x < \infty

f (x) = - 6 6 x^{2} + 2

f (x) = 36 - 9 x^{2}

(- 3, - 6), (1, 4)

- 2 x^{2} + 2 x - 4

3 x^{2} - 14 x + 15

What is the domain of f(x)=x^2-9 ?
The domain of f(x)=x^2-9 is -infinity <x<infinity