Question

The key numbers of a rational expression are its ________________

Answer 1

Rational expressions are defined as the quotients of two integers in which the denominator does not equal to zero. Thus, the numerator and denominator would be polynomials, which is a form of a system analogous to the integers under the operation of addition, subtraction and multiplications. Therefore, the key numbers of rational expressions are its variables in the numerator and/ or denominator.