Question #00168
1 Answer
Oct 13, 2015
You may have copied the problem down incorrectly, because the exact roots are not pleasant to write down. The three roots are approximately
Explanation:
There is a method to solve cubics exactly. You can find it here: formula for roots of cubic
If you are "lucky" and the cubic has rational number roots, the rational root theorem can be used to find exact answers.
Your example has no rational roots. Here's a screenshot of what Wolfram Alpha produces for the exact answers:
