GED Math Practice Questions: Computing with Rational Expressions
In the Mathematical Reasoning section of the GED, you may have to perform some computations with rational expressions. The following example questions ask you to subtract and multiply numeric fractions.
Practice questions

Subtract the following rational expressions:

Multiply the following rational expressions:
Answers and explanations

The result is
Start by factoring the denominator in both rational expressions:
Multiply the first expression by
and the second fraction by
and you have:

The result is
Here’s how you find it: