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How to Multiply Rational Expressions On a Calculator

Rational expressions are easily multiplied on a calculator only if there are no unknown variables, only constants. Rational expressions with unknown variables can easily be multiplied, but on paper only. To be clear, a rational expression is algebraic. It is expressed in the form of two expressions in a fraction (X/Y) and the denominator is not zero. Most of the time, the expressions are polynomials. A polynomial is an expression that contains terms that are added, subtracted or multiplied, but not divided. An example is (5+6)/(10*7).

Instructions

  1. Simple Calculator

    • 1

      Enter the numerator of the rational expression into the calculator and hit enter.

    • 2

      Write down or remember the answer.

    • 3

      Enter the denominator expression into the calculator and press enter.

    • 4

      Clear the screen. Then enter the answer for the numerator. Press divide and enter the answer for the denominator. You have your answer.

    Graphing Calculator

    • 5

      Use parentheses and enter the numerator expression into the parentheses. When using a graphing calculator, you will enter the entire rational expression on the screen before pressing enter.

    • 6

      Press the divide button.

    • 7

      Enter the denominator expression within another set of parentheses.

    • 8

      Press enter. You will have your answer. A graphing calculator is able to follow the order of operations rule and solve the expressions in the parentheses first.

K-12 Basics
K-12 Basics
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