Find all numbers for which the rational expression is not defined.
-$$\frac { 2 } { a - 9 }$$
A) None
B) $a = 9$
C) $a = - 9$
D) $a = 0$

Question

Quizplus · Accepted Answer

The expression is undefined when the denominator is equal to zero. Therefore, we need to solve the equation $a-9=0$ to find the value(s) of $a$ that makes the expression undefined. This gives us $a=9$. Thus, the answer is choice B, which is the only value of $a$ that makes the expression undefined.

Find All Numbers for Which the Rational Expression Is Not 2a−9\frac { 2 } { a - 9 }a−92​

Find All Numbers for Which the Rational Expression Is Not $\frac { 2 } { a - 9 }$