What is the domain of f(x)=(-3x^2-9x)/(-x+1) ?

The domain of f(x)=(-3x^2-9x)/(-x+1) is x 1

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domain of f(x)=(-3x^2-9x)/(-x+1)

domain

f (x) = \frac{- 3 x ^{2} - 9 x}{- x + 1}

x < 1 or x > 1

Interval Notation

(- \infty, 1) \cup (1, \infty)

Solution steps

Find undefined (singularity) points:

x = 1

The function domain

x < 1 or x > 1

\frac{x ^{2}}{2 - x}

(0, 3), (0, 12)

- x^{2} + 4

x^{2} = - 10 y

f (x) = x + cos (x)

What is the domain of f(x)=(-3x^2-9x)/(-x+1) ?
The domain of f(x)=(-3x^2-9x)/(-x+1) is x<1\lor x>1