Find All Numbers for Which the Rational Expression Is Not $$\frac { x ^ { 2 } - 81 } { x ^ { 2 } - 7 x + 12 }$$

question 41

Multiple Choice

Find all numbers for which the rational expression is not defined.
- $$\frac { x ^ { 2 } - 81 } { x ^ { 2 } - 7 x + 12 }$$

• A) \(x = 0\)
• B) \(x = 9\) and \(x = - 9\)
• C) \(x = - 3\) and \(x = - 4\)
• D) \(x = 3\) and \(x = 4\)

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