2016-06-22
[public] 36.0K views, 382 likes, dislikes audio only
Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/math/multivariable-calculus/applications-of-multivariable-derivatives/optimizing-multivariable-functions-videos/v/second-partial-derivative-test-example-part-1
A worked example of finding a classifying critical points of a two-variable function.