Rational Expressions
1 Specify Numbers That Must Be Excluded from the Domain of a Rational Expression
-$$\frac { x + 3 } { x ^ { 2 } - 64 }$$

Name: Rational Expressions 1 Specify Numbers That Must Be Excluded from the Domain of a Rational Expression -\[\frac { x + 3 } { x ^ { 2 } - 64 }\]
Brand: Quizplus
Rating: 4.8 (48 reviews)

Question

Quizplus · Accepted Answer

The denominator $x^2 - 64$ factors into $(x + 8)(x - 8)$. For the expression to be defined, the denominator cannot be zero. Therefore, $x$ cannot be $8$ or $-8$, making choice A correct.