Fill in the blank with one of the words or phrases listed below. Not all choices will be used. $$\begin{array} { l l l l }
\text { least common denominator } & \text { simplifying } & \text { reciprocals } & \text { numerator } \
\text { cross products } & \text { ratio } & \text { proportion } & \text { denominator } \
\text { rational expression } & \text { domain } & \text { complex fraction } & \
\frac { - a } { b } & \frac { a } { - b } & \frac { - a } { - b } &
\end{array}$$
-A rational expression is undefined when the is 0.
A) rational expression
B) complex fraction
C) denominator
D) numerator

Question

Fill in the blank with one of the words or phrases listed below. Not all choices will be used. $$\begin{array} { l l l l } 
\text { least common denominator } & \text { simplifying } & \text { reciprocals } & \text { numerator } \
\text { cross products } & \text { ratio } & \text { proportion } & \text { denominator } \
\text { rational expression } & \text { domain } & \text { complex fraction } & \
\frac { - a } { b } & \frac { a } { - b } & \frac { - a } { - b } &
\end{array}$$
-A rational expression is undefined when the is 0.
A) rational expression
B) complex fraction
C) denominator
D) numerator

Quizplus · Accepted Answer

A rational expression is undefined when the denominator is 0, because division by zero is undefined in mathematics.

Fill in the Blank with One of the Words or Phrases