Ex 3: Find the Zeros of a Polynomial Function with Irrational Zeros

This video provides an example of how to find the zeros of a degree 3 polynomial function with the help of a graph of the function. The function as 1 real rational zero and 2 irrational zeros.

[SDSsongs]

What if you're trying to find the zeros of a cubic function and there are no rational zeros? I can graph it and find the values that way, but it there any way to find those algebraically?

[peterwelch]

Thanks, man. This was a tutorial on a topic I was having trouble finding, and now I totally understand.

[dctrjns]

Thank you for this excellent video tutorial! My son was in dire need!

[kaylasilverstein]

Hey just wanted to say thanks for helping. I’ve been using these vids and they make it so much easier!

[jordanbrown]

You explain this so perfectly... thank you so much! I just subscribed. I will be watching all your videos throughout this semester hahahaha

[luisrosano]

What if the three roots are irrational roots, and the coefficient still are integers? example: 4x^2 - 3x^2 -7x - 2.

[zanebrobst]

this was excellent. I'd like this video more than once if I could.

[triplethreatempire]

can you graph an irrational zero for a polynomial function?

[nabeat]

thank you very much it was really helpful may GOD bless you.

[trixigolding]

as a college algebra student, THANK YOU!