Algebra

I need to test the integral bounds for the roots.

6x^3-7x^2+7x+9=0

I used synthetic division to find my answer.

1 6 -7 7 9
6 -1 6
6 -1 6 15

0 6 -7 7 9
0 0 0
6 -7 7 9

-1 6 -7 7 9
-6 13 20
6 -13 20 29

2 6 -7 7 9
12 10 34
6 5 17 43

my answer: -1<x<1
I don't understand why the answer is 2, when by my calculation 1 fits.

correct answer:
-1<x<2

  1. 👍 0
  2. 👎 0
  3. 👁 139
asked by Lori

Respond to this Question

First Name

Your Response

Similar Questions

  1. Pre Calc (For Reiny)

    Thanks so much your method worked perfectly! My solution was: the remaining zeros were 5+2i, 3, and -4 I have one question that's bugging me though, why is it that synthetic division did not work for me? I thought that long

    asked by Zach on November 15, 2009
  2. college algebra

    Use the theorem on bounds to establish the best integral bounds for the roots of the equation w^(4)-8w^(3)+2w^(2)+10w-1=0

    asked by Alex on October 26, 2010
  3. college algebra

    Use the theorem on bounds to establish the best integral bounds for the roots of the equation: w^(4)-8w^(3)+2w^(2)+10w-1=0

    asked by samantha on November 8, 2010
  4. Algebra

    I am not sure if I did this right, it is the theorem on bounds to establish integral bounds for roots of equation. 6x^3-7x^2+7x+9=0 1 6 -7 7 9 0 6 -7 7 9 6 -1 6 0 0 0 6 -1 6 15 6 -7 7 9 -1 6 -7 7 9 -6 13 20 6 -13 20 29 answer is

    asked by Bradley on April 3, 2008
  5. college algebra

    Use the theorem on bounds to establish the best integral bounds for the roots of the equation w^(4)-8w^(3)+2w^(2)+10w-1=0

    asked by samantha on October 27, 2010
  6. college algebra

    Use the theorem on bounds to establish the best integral bounds for the roots of the equation w^(4)-8w^(3)+2w^(2)+10w-1=0

    asked by samantha on October 27, 2010
  7. Precalculus

    "Show that x^6 - 7x^3 - 8 = 0 has a quadratic form. Then find the two real roots and the four imaginary roots of this equation." I used synthetic division to get the real roots 2 and -1, but I can't figure out how to get the

    asked by Emily on September 20, 2009
  8. math-intergral upper bound

    This one has me stumped. Find the least integral upper bound of the zeros of the function f(x)=x^3-x^2+1 So by the rational root theorem, 1 and -1 might be roots. by using synthetic division, i get the following values: for

    asked by Jennifer on May 6, 2008
  9. Algebra

    Divide using long division or synthetic division. (21x^3 - 7)/(3x - 1) Just wondering, how would you solve this problem using synthetic division?

    asked by Jule on October 26, 2007
  10. Algebra

    Divide using long division or synthetic division. (21x^3 - 7)/(3x - 1) Just wondering, how would you solve this problem using synthetic division?

    asked by Jule on October 26, 2007

More Similar Questions