# What are extrema and saddle points of #f(x, y) = x^3y + 36x^2 - 8y#?

##### 1 Answer

Apr 25, 2018

See the answer below:

#### Explanation:

Credits:

Thanks to Graphing Calculator 3D (https://www.runiter.com/graphing-calculator/) who provided the software to plot the 3D function with the results.