What is the domain of f(x)=x^2-4x-21 ?

The domain of f(x)=x^2-4x-21 is -infinity <x<infinity

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domain of f(x)=x^2-4x-21

domain

f (x) = x^{2} - 4 x - 21

- \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

(ln (x))^{2}

f (x) = (x + 2) (x - 2)

0.5 x^{2} - 6 x + 21

\frac{1}{x ^{2} + 1}

f (x) = 3 x^{2} + 6 x - 3

What is the domain of f(x)=x^2-4x-21 ?
The domain of f(x)=x^2-4x-21 is -infinity <x<infinity