# Simple Cubic Equation

Pro Problems > Math > Algebra > Equations > Higher Degree## Simple Cubic Equation

The following cubic equation can be readily solved using factoring methods. Solve without using the rational root theorem.

2x^{3} - x^{2} - 18x + 9 = 0

Presentation mode

Problem by Mr. H

## Solution

In order to make it feasible for teachers to use these problems in their classwork, no solutions are publicly visible, so students cannot simply look up the answers. If you would like to view the solutions to these problems, you must have a Virtual Classroom subscription.Assign this problem

Click here to assign this problem to your students.## Similar Problems

### Eighth Degree Equation

Find all the roots - both real and complex of the eighth degree polynomial equation below:

x^{8} - 3x^{7} +2x^{6} - 2x^{5} + 6x^{4} -4x^{3} + x^{2} - 3x + 2 = 0

### Fourth Degree

Find, to the nearest hundredth, all four roots of the fourth degree equation below:

x^{4} - 5x^{2} - 3 = 0

# Ask Professor Puzzler

Do you have a question you would like to ask Professor Puzzler? Click here to ask your question!**Over 3,000 Pages of Free Content**

We've been providing free educational games and resources since 2002.

Would you consider a donation of any size to help us continue providing great content for students of all ages?

Like us on Facebook to get updates about new resources