zaynahf 2 years ago Polynomial Functions

1. zaynahf

I need to find the rational zeroes for this polynomial: $f(x)= x ^{3}-2x ^{2}-13x-10$ I got $\pm10, \pm5, \pm1, \pm2$ for possible answers..

2. geerky42

Set x³−2x²−13x−10 to be equal to 0. Plug in your possible answers and solve it. Whatever that is true is one of your answer. I know it takes time, but that I would do if I were you.

3. zaynahf

SO basically you have to plug in ALL of the values? Like all 8 of em?

4. geerky42

Yeah. I'm pretty sure there is a shortcut for this, but I cannot remember, sorry.

5. zaynahf

Ok.. thanks