Question

Solve the inequality.
(3x^3)-9x+5 is greater than or equal to 0

Answer 1

you just solve like normal but instead of using an equal sign use the inaquality im pretty sure

Answer 2

Sky202 is only partially right: start with an equality and find the answer to that, before you move to the inequality.

I've attached a simple graph of this function and it shows that like any other 3rd order function, it has 3 zero-crossings. On the lefthand side, the function disappears rapidly to large negative Y values, on the right hand side, so beyond the 3rd zero crossing, the function climbs to very high Y values.

There is no easy way to find these zero-crossings, for as far as I can see. Trial and error is an option, because these are pretty 'unusual'. Simplifying the function by splitting off 'easy to spot' values for X does therefore not work. Hope this helps a little...

Answer 3

Sorry...forgot the drawing.