# 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

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Problem by Mr. H

## Solution

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

### Fourth Degree

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

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

### 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

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