help please. i tried using the p/q method, but when i graphed it the roots were all fractions.

Hey Elizabeth -- if 2x^3 -9x^2

**-2x**+3, then 1/2 is a root ... divide by 2x-1 to get quadratic :)help please. i tried using the p/q method, but when i graphed it the roots were all fractions.

Tutors, please sign in to answer this question.

Blacksburg, VA

Hey Elizabeth -- if 2x^3 -9x^2 **-2x** +3, then 1/2 is a root ... divide by 2x-1 to get quadratic :)

New Wilmington, PA

Are you sure your coefficients are correct?

This polynomial does not factor in an obvious way. The exact solution requires use of the so-called cubic formula, which involves complex numbers. The three roots are irrational numbers and can be approximated numerically. You get

x_{1}≈-0.458, x_{2}≈0.784, x_{3}≈4.174

- Math 9863
- Precalculus 1586
- Algebra 2 3503
- Math Help 5447
- Algebra 1 4075
- Geometry 1907
- Calculus 2205
- Trig 174
- Trigonometric Functions 220
- Prealgebra 172

## Comments