rational expression
nounUK /ˈræʃənəl ɪkˈspreʃən/
US /ˈræʃənəl ɪkˈspreʃən/
A rational expression is a fraction made of math expressions, like a top and bottom part with letters and numbers.
The teacher asked us to simplify the rational expression (x + 2)/(x - 3).
RELATED WORDS
OTHER MEANINGS
2. A quotient of two polynomials in algebra.
Every rational expression can be written as one polynomial divided by another.
3. An expression that can be written as a ratio of two algebraic expressions.
We learned that a rational expression is undefined when its denominator equals zero.
4. A fraction involving variables that follows the rules of rational numbers.
She simplified the rational expression by canceling common factors.