### Home > CALC > Chapter 4 > Lesson 4.2.4 > Problem 4-89

4-89.

Review Hanah's method for setting up a derivative. Use Hanah's definition of a derivative to differentiate *f*(*x*) = 4*x*^{2} − 9*x *− 1. Homework Help ✎

4-89.

Review Hanah's method for setting up a derivative. Use Hanah's definition of a derivative to differentiate *f*(*x*) = 4*x*^{2} − 9*x *− 1. Homework Help ✎