For which values of x does the curve Y= (3x^3-3x^2+1) / (2x^2-1) , have a horizontal tangent?

Question

For which values of x does the curve Y= (3x^3-3x^2+1) / (2x^2-1) ,   have a horizontal tangent?

Show steps or explain, i dont get it

Ms. Sue · Answer

Jaime/Mikey/Jessi/Carmen -- please use the same name for your posts.

Reiny · Answer

Take the first derivative, set it equal to zero, and solve for x That is your x