- #1

PainterGuy

- 940

- 69

- Homework Statement
- I'm not able to understand why I'm only getting two roots of cubic polynomial.

- Relevant Equations
- Please check my posting.

Hi,

I was trying to find roots of the following cubic polynomial and there are only two roots. I believe there should be three roots. Could you please guide me why there are only two roots?

If you say that the "1" repeats itself as a root then I'd say the same could be said of "0.9". Thank you!

Source:

https://www.wolframalpha.com/input/?i=find+roots+x³-2.9x²%2B2.8x-0.9

I was trying to find roots of the following cubic polynomial and there are only two roots. I believe there should be three roots. Could you please guide me why there are only two roots?

If you say that the "1" repeats itself as a root then I'd say the same could be said of "0.9". Thank you!

Source:

https://www.wolframalpha.com/input/?i=find+roots+x³-2.9x²%2B2.8x-0.9