How to Evaluate Limits by Rationalizing (Precalculus)

Need help evaluating limits in precalculus? In this video, you’ll learn how to evaluate limits of polynomial and rational functions by rationalizing with conjugates. We walk through step-by-step examples so you can confidently solve limits at specific points—even when you run into tricky indeterminate forms like 0/0. You’ll also learn when and why to use rationalizing to simplify expressions involving square roots. This lesson is perfect for precalculus students, Algebra 2 review, or anyone preparing for calculus. What you’ll learn: Evaluating limits using direct substitution Limits of polynomial and rational functions Factoring to simplify expressions Rationalizing using conjugates (square root limits) Solving indeterminate forms like 0/0 #precalculus #limits #mathhelp #learnmath #calculusprep #algebra #mathtutorial #rationalizing #conjugates #rationalfunctions #polynomial #studentsuccess #homeworkhelp #stemeducation #highschoolmath