- #1

- 1,197

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I need to find when 2x^3+x-5 is equal to zero and I'm stuck

2x^3+x-5=0

5=2x^3+x....then what?

2x^3+x-5=0

5=2x^3+x....then what?

- Thread starter UrbanXrisis
- Start date

- #1

- 1,197

- 1

I need to find when 2x^3+x-5 is equal to zero and I'm stuck

2x^3+x-5=0

5=2x^3+x....then what?

2x^3+x-5=0

5=2x^3+x....then what?

- #2

Hurkyl

Staff Emeritus

Science Advisor

Gold Member

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There is a really nice theorem for finding all of the rational zeroes of a polynomial that involves the first and last terms of the polynomial, have you seen it yet?

- #3

HallsofIvy

Science Advisor

Homework Helper

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- 961

(The method I used was to graph it on my calculator, then "zoom" in on the x-intercept!)

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