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Activity
Oswego City School District

Regents Exam Prep Center: Undefined Fractions

For Students 9th - 10th
This algebra tutorial helps students determine when a fraction is undefined and includes examples with rational expressions.
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Activity
Help Algebra

Help algebra.com: Rational Expressions

For Students 9th - 10th
In addition to defining rational expressions, this resource demonstrates how to find the excluded values and zeros of the expressions.