Monday

September 1, 2014

September 1, 2014

Posted by **Jamie** on Monday, March 23, 2009 at 11:58am.

My answer: the possible rational roots are {±1, ±2, ±3, ±6, ±7, ±14, ±21, ±42. ±1/2, ±3/2, ± 7/2, ±21/2}.

Correct?

- Advanced Math. -
**Reiny**, Monday, March 23, 2009 at 1:08pmyes, and guess what?

x = 1 works!

after a quick synthetic division I got

2x^3 + 17x^2 + 23x - 42 = 0

(x-1)(x^2 + 19x + 42) = 0

and that quadratic factors very nicely again.

- Advanced Math. -
**Count Iblis**, Monday, March 23, 2009 at 1:18pmYes, this is what you get when you apply the Rational Roots theorem.

But your list is very long, so it is of little use. It is a bit like answering the question by saying that all possible rational roots are the members of Q (as the problem didn't specifically say to list all the roots that the Rational Roots theorem yields).

- Advanced Math. -
**Bartolo Windu**, Wednesday, October 31, 2012 at 5:30pmIncorrect

**Answer this Question**

**Related Questions**

Pre-Calc-Please check - Is this correct? Using Rational Roots Theorem, list all...

algebra - using the rational root theorem to list all possible rational roots of...

Pre-Calc-Please check - I have three questions: 1. What is the remainder of (x^3...

math - List all possible rational zeros of... h(x)= 2x to the (4th power) - 5x (...

Math - Rational Roots - 1.) What are the possible rational roots of the function...

ALGEBRA 2 - Use the Rational Root Theorem to list all possible rational roots ...

Algebra - Use the Rational Theorem to list the possible rational roots. f(x)=x^2...

algebra - use the rational root theorem to list the possible rational roots for ...

Math - State the number of complex roots,possible number of real roots and ...

algebra - Factor this polynomial: F(x)=x^3-x^2-4x+4 Try to find the rational ...