EDGE Math 8

Determine whether each statement is true or false. Choose the correct answer.

1.	The domain of a rational expression is the set of all real numbers, except those that will make the denominator of the rational expression equal to zero.

True

False

Answer: True

2.	The domain of $\frac{1}{x (x + 1) (x - 1)}$ is the set of real numbers except 1 and –1.

True

False

Answer: False; its domain is the set of real numbers except 1, –1, and 0.

3.	The domain of $\frac{1}{x^{2} + 1}$ is the set of real numbers except –1.

True

False

Answer: False; its domain is the set of all real numbers.

4.	The simplest form of $\frac{x^{4} - 16}{3 x^{2} - 12}$ is $\frac{x^{2} + 4}{3} .$

True

False

Answer: True

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