Answer:
if there are no common factors in its numerator and denominator
Explanation:
Simplified Rational Expression
A rational expression is considered simplified if there are no common factors in its numerator and denominator. For example: 2 3 2 3 is simplified because there are no common factors of 2 and 3. 2 x 3 x 2 x 3 x is not simplified because x is a common factor of 2x and 3x.