Evaluating a limit by factoring

The video tutorial covers the concept of limits in calculus, focusing on direct substitution and its limitations when the denominator is zero. It explains how to simplify rational functions by factoring, allowing for the application of direct substitution to find limits. The tutorial also discusses the importance of understanding function constraints and how they differ from finding limits, emphasizing that while a function may not exist at a certain point, its limit can still be determined.

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