Calculus - Application of Differentiation (4 of 60) Max/Min Values: Ex. 3 f(x)=x^3+3x^2-9x+1

In this video I will find max/min, where f(x) is increasing/decreasing of f(x)=x^3+3x^2-9x+1.

[irmakvural]

I love you so much you saved our lives literally

[ChinaGuurl]

I wish my calc professor gave me problems like this but instead we get extremely difficult, multi-step problems that are hard to approach.

Your videos are really helping me though, so thank you for the uploads!

[Standsumtin]

I figured since I always watch your videos. I wanted to tell you thank you and I love your style of teaching.

[joeyborja]

(Sep2020) I have a question, sir. How would we know if the two points are just local maximum without solving or knowing the other critical points to the left and to the right of the solved critical points?

[chichang]

i don't understand how 0=(x-1)(x+3) interchanged signs to x=1 and x-3?