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# What Is a Rational Expression?

**A rational expression in mathematics is an expression that is the ratio of two polynomials.** Most often, it is expressed as a fraction, such as (x^2 + 5)/(x - 2).

A polynomial is a mathematical expression that can have constants, variables and exponents. The various terms can be combined using addition, subtraction, multiplication and division, but certain restrictions apply. There can be no negative or fractional exponents, and it cannot contain a number divided by a variable, such as 1/x. Despite the name "polynomial," meaning "many terms," even a single term can be called a polynomial. For that reason, all polynomials can be called rational expressions, since they can all be rewritten as a fraction with 1 as the denominator.

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## What Does a Math Teacher Mean When She Says, "Write a Verbal Expression to Represent Each Expression"?

A: When a math teacher says, "Write a verbal expression to represent each expression," she wants the students to change the algebraic representation into Engl... Full Answer >Filed Under: -
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## What Is a Mathematical Verbal Expression?

A: A mathematical verbal expression is a translation into words of an algebraic expression that can consist of different operations, numbers and variables. An... Full Answer >Filed Under: -
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## In Mathematical Terms, What Does "factor" Mean?

A: A factor is a number or expression that divides another number or expression evenly without a remainder. For instance, two, four, five and 10 are factors o... Full Answer >Filed Under: -
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## What Are the Four Fundamental Operations of Mathematics?

A: The fundamental operations in mathematics are addition, subtraction, multiplication and division. There are corresponding symbols for each. The plus sign (... Full Answer >Filed Under: