Learn with Mentor · 7 min
Evaluate Rational Expressions
Substitute into the numerator of a rational expression, simplify the numerator completely, then divide by the denominator while keeping signs correct.
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What are we learning?
A rational expression is a fraction-style expression. In these questions, the numerator contains x, and the denominator is a number. Evaluate by substituting x first, simplifying the numerator, then dividing.