Algebra and Trigonometry: Structure and Method, Book 2
Algebra and Trigonometry: Structure and Method, Book 2
2000th Edition
ISBN: 9780395977255
Author: MCDOUGAL LITTEL
Publisher: McDougal Littell
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Chapter 8.8, Problem 12WE
To determine

To calculate : the real root of the given equation P(x)=0 and approximate it to the nearest tenth.

Expert Solution & Answer
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Answer to Problem 12WE

The real root of the given equation is 2.2

Explanation of Solution

Given information :

The polynomial equation:

  P(x)=x3+11

Formula used :

Intermediate-Value Theorem:

If P is a polynomial function with real coefficients, and m is any number between P (a) and P ( b ), then there is at least one number c between a and b for which P ( c ) = m .

Calculation :

As per the given problem,

Consider the given equation:

  P(x)=x3+11

By Descartes’s rule P(x)=0 has no positive roots. Make a table using negative values of x.

The table of values at the left below shows that P(3)<0 and P(2)>0 . Therefore, for some r between 3 and 2 , P(r)=0 .

  Algebra and Trigonometry: Structure and Method, Book 2, Chapter 8.8, Problem 12WE , additional homework tip  1Algebra and Trigonometry: Structure and Method, Book 2, Chapter 8.8, Problem 12WE , additional homework tip  2

The table of values at the right above, shows that r is between 2.3 and 2.2 . Since P(2.2) is closer to 0 than P(2.3) , it can be assumed that r is closer to 2.2 . Therefore, to the nearest tenth, the real zero of P is 2.2

Chapter 8 Solutions

Algebra and Trigonometry: Structure and Method, Book 2

Ch. 8.1 - Prob. 11OECh. 8.1 - Prob. 12OECh. 8.1 - Prob. 1WECh. 8.1 - Prob. 2WECh. 8.1 - Prob. 3WECh. 8.1 - Prob. 4WECh. 8.1 - Prob. 5WECh. 8.1 - Prob. 6WECh. 8.1 - Prob. 7WECh. 8.1 - Prob. 8WECh. 8.1 - Prob. 9WECh. 8.1 - Prob. 10WECh. 8.1 - Prob. 11WECh. 8.1 - Prob. 12WECh. 8.1 - Prob. 13WECh. 8.1 - Prob. 14WECh. 8.1 - Prob. 15WECh. 8.1 - Prob. 16WECh. 8.1 - Prob. 17WECh. 8.1 - Prob. 18WECh. 8.1 - Prob. 19WECh. 8.1 - Prob. 20WECh. 8.1 - Prob. 21WECh. 8.1 - Prob. 22WECh. 8.1 - Prob. 23WECh. 8.1 - Prob. 24WECh. 8.1 - Prob. 25WECh. 8.1 - Prob. 1PCh. 8.1 - Prob. 2PCh. 8.1 - Prob. 3PCh. 8.1 - Prob. 4PCh. 8.1 - Prob. 5PCh. 8.1 - Prob. 6PCh. 8.1 - Prob. 7PCh. 8.1 - Prob. 8PCh. 8.1 - Prob. 9PCh. 8.1 - Prob. 10PCh. 8.1 - Prob. 11PCh. 8.1 - Prob. 12PCh. 8.1 - Prob. 13PCh. 8.1 - Prob. 14PCh. 8.1 - Prob. 15PCh. 8.1 - Prob. 16PCh. 8.1 - Prob. 17PCh. 8.1 - Prob. 18PCh. 8.1 - Prob. 19PCh. 8.1 - Prob. 20PCh. 8.1 - Prob. 1MRECh. 8.1 - Prob. 2MRECh. 8.1 - Prob. 3MRECh. 8.1 - Prob. 4MRECh. 8.1 - Prob. 5MRECh. 8.1 - Prob. 6MRECh. 8.1 - Prob. 7MRECh. 8.1 - Prob. 8MRECh. 8.1 - Prob. 9MRECh. 8.2 - Prob. 1OECh. 8.2 - Prob. 2OECh. 8.2 - Prob. 3OECh. 8.2 - Prob. 4OECh. 8.2 - Prob. 5OECh. 8.2 - Prob. 6OECh. 8.2 - Prob. 7OECh. 8.2 - Prob. 8OECh. 8.2 - Prob. 9OECh. 8.2 - Prob. 10OECh. 8.2 - Prob. 11OECh. 8.2 - Prob. 12OECh. 8.2 - Prob. 13OECh. 8.2 - Prob. 14OECh. 8.2 - Prob. 1WECh. 8.2 - Prob. 2WECh. 8.2 - Prob. 3WECh. 8.2 - Prob. 4WECh. 8.2 - Prob. 5WECh. 8.2 - Prob. 6WECh. 8.2 - Prob. 7WECh. 8.2 - Prob. 8WECh. 8.2 - Prob. 9WECh. 8.2 - Prob. 10WECh. 8.2 - Prob. 1PCh. 8.2 - Prob. 2PCh. 8.2 - Prob. 3PCh. 8.2 - Prob. 4PCh. 8.2 - Prob. 5PCh. 8.2 - Prob. 6PCh. 8.2 - Prob. 7PCh. 8.2 - Prob. 8PCh. 8.2 - Prob. 9PCh. 8.2 - Prob. 10PCh. 8.2 - Prob. 11PCh. 8.2 - Prob. 12PCh. 8.2 - Prob. 13PCh. 8.2 - Prob. 14PCh. 8.2 - Prob. 1STCh. 8.2 - Prob. 2STCh. 8.2 - Prob. 3STCh. 8.2 - Prob. 4STCh. 8.2 - Prob. 5STCh. 8.2 - Prob. 6STCh. 8.2 - Prob. 7STCh. 8.3 - Prob. 1OECh. 8.3 - Prob. 2OECh. 8.3 - Prob. 3OECh. 8.3 - Prob. 4OECh. 8.3 - Prob. 5OECh. 8.3 - Prob. 6OECh. 8.3 - Prob. 7OECh. 8.3 - Prob. 8OECh. 8.3 - Prob. 9OECh. 8.3 - Prob. 10OECh. 8.3 - Prob. 11OECh. 8.3 - Prob. 12OECh. 8.3 - Prob. 1WECh. 8.3 - Prob. 2WECh. 8.3 - Prob. 3WECh. 8.3 - Prob. 4WECh. 8.3 - Prob. 5WECh. 8.3 - Prob. 6WECh. 8.3 - Prob. 7WECh. 8.3 - Prob. 8WECh. 8.3 - Prob. 9WECh. 8.3 - Prob. 10WECh. 8.3 - Prob. 11WECh. 8.3 - Prob. 12WECh. 8.3 - Prob. 13WECh. 8.3 - Prob. 14WECh. 8.3 - Prob. 15WECh. 8.3 - Prob. 16WECh. 8.3 - Prob. 17WECh. 8.3 - Prob. 18WECh. 8.3 - Prob. 19WECh. 8.3 - Prob. 20WECh. 8.3 - Prob. 21WECh. 8.3 - Prob. 22WECh. 8.3 - Prob. 23WECh. 8.3 - Prob. 24WECh. 8.3 - Prob. 25WECh. 8.3 - Prob. 26WECh. 8.3 - Prob. 27WECh. 8.3 - Prob. 28WECh. 8.3 - Prob. 29WECh. 8.3 - Prob. 30WECh. 8.3 - Prob. 31WECh. 8.3 - Prob. 32WECh. 8.3 - Prob. 33WECh. 8.3 - Prob. 34WECh. 8.3 - Prob. 1MRECh. 8.3 - Prob. 2MRECh. 8.3 - Prob. 3MRECh. 8.3 - Prob. 4MRECh. 8.3 - Prob. 5MRECh. 8.3 - Prob. 6MRECh. 8.3 - Prob. 7MRECh. 8.3 - Prob. 8MRECh. 8.4 - Prob. 1OECh. 8.4 - Prob. 2OECh. 8.4 - Prob. 3OECh. 8.4 - Prob. 4OECh. 8.4 - Prob. 5OECh. 8.4 - Prob. 6OECh. 8.4 - Prob. 1WECh. 8.4 - Prob. 2WECh. 8.4 - Prob. 3WECh. 8.4 - Prob. 4WECh. 8.4 - Prob. 5WECh. 8.4 - Prob. 6WECh. 8.4 - Prob. 7WECh. 8.4 - Prob. 8WECh. 8.4 - Prob. 9WECh. 8.4 - Prob. 10WECh. 8.4 - Prob. 11WECh. 8.4 - Prob. 12WECh. 8.4 - Prob. 13WECh. 8.4 - Prob. 14WECh. 8.4 - Prob. 15WECh. 8.4 - Prob. 16WECh. 8.4 - Prob. 17WECh. 8.4 - Prob. 18WECh. 8.4 - Prob. 19WECh. 8.4 - Prob. 20WECh. 8.4 - Prob. 21WECh. 8.4 - Prob. 22WECh. 8.4 - Prob. 23WECh. 8.4 - Prob. 24WECh. 8.4 - Prob. 1ECh. 8.4 - Prob. 2ECh. 8.4 - Prob. 3ECh. 8.4 - Prob. 4ECh. 8.4 - Prob. 5ECh. 8.5 - Prob. 1OECh. 8.5 - Prob. 2OECh. 8.5 - Prob. 3OECh. 8.5 - Prob. 4OECh. 8.5 - Prob. 5OECh. 8.5 - Prob. 6OECh. 8.5 - Prob. 1WECh. 8.5 - Prob. 2WECh. 8.5 - Prob. 3WECh. 8.5 - Prob. 4WECh. 8.5 - Prob. 5WECh. 8.5 - Prob. 6WECh. 8.5 - Prob. 7WECh. 8.5 - Prob. 8WECh. 8.5 - Prob. 9WECh. 8.5 - Prob. 10WECh. 8.5 - Prob. 11WECh. 8.5 - Prob. 12WECh. 8.5 - Prob. 13WECh. 8.5 - Prob. 14WECh. 8.5 - Prob. 15WECh. 8.5 - Prob. 16WECh. 8.5 - Prob. 17WECh. 8.5 - Prob. 18WECh. 8.5 - Prob. 19WECh. 8.5 - Prob. 20WECh. 8.5 - Prob. 21WECh. 8.5 - Prob. 22WECh. 8.5 - Prob. 23WECh. 8.5 - Prob. 24WECh. 8.5 - Prob. 25WECh. 8.5 - Prob. 26WECh. 8.5 - Prob. 27WECh. 8.5 - Prob. 28WECh. 8.5 - Prob. 29WECh. 8.5 - Prob. 30WECh. 8.5 - Prob. 31WECh. 8.5 - Prob. 32WECh. 8.5 - Prob. 33WECh. 8.5 - Prob. 34WECh. 8.5 - Prob. 35WECh. 8.5 - Prob. 36WECh. 8.5 - Prob. 37WECh. 8.5 - Prob. 38WECh. 8.5 - Prob. 39WECh. 8.5 - Prob. 1MRECh. 8.5 - Prob. 2MRECh. 8.5 - Prob. 3MRECh. 8.5 - Prob. 4MRECh. 8.5 - Prob. 5MRECh. 8.5 - Prob. 6MRECh. 8.5 - Prob. 7MRECh. 8.5 - Prob. 8MRECh. 8.5 - Prob. 9MRECh. 8.6 - Prob. 1OECh. 8.6 - Prob. 2OECh. 8.6 - Prob. 3OECh. 8.6 - Prob. 4OECh. 8.6 - Prob. 5OECh. 8.6 - Prob. 6OECh. 8.6 - Prob. 7OECh. 8.6 - Prob. 8OECh. 8.6 - Prob. 9OECh. 8.6 - Prob. 10OECh. 8.6 - Prob. 11OECh. 8.6 - Prob. 12OECh. 8.6 - Prob. 13OECh. 8.6 - Prob. 14OECh. 8.6 - Prob. 15OECh. 8.6 - Prob. 1WECh. 8.6 - Prob. 2WECh. 8.6 - Prob. 3WECh. 8.6 - Prob. 4WECh. 8.6 - Prob. 5WECh. 8.6 - Prob. 6WECh. 8.6 - Prob. 7WECh. 8.6 - Prob. 8WECh. 8.6 - Prob. 9WECh. 8.6 - Prob. 10WECh. 8.6 - Prob. 11WECh. 8.6 - Prob. 12WECh. 8.6 - Prob. 13WECh. 8.6 - Prob. 14WECh. 8.6 - Prob. 15WECh. 8.6 - Prob. 16WECh. 8.6 - Prob. 17WECh. 8.6 - Prob. 18WECh. 8.6 - Prob. 19WECh. 8.6 - Prob. 20WECh. 8.6 - Prob. 21WECh. 8.6 - Prob. 22WECh. 8.6 - Prob. 23WECh. 8.6 - Prob. 24WECh. 8.6 - Prob. 25WECh. 8.6 - Prob. 26WECh. 8.6 - Prob. 27WECh. 8.6 - Prob. 28WECh. 8.6 - Prob. 29WECh. 8.6 - Prob. 1STCh. 8.6 - Prob. 2STCh. 8.6 - Prob. 3STCh. 8.6 - Prob. 4STCh. 8.6 - Prob. 5STCh. 8.6 - Prob. 6STCh. 8.6 - Prob. 7STCh. 8.7 - Prob. 1OECh. 8.7 - Prob. 2OECh. 8.7 - Prob. 3OECh. 8.7 - Prob. 4OECh. 8.7 - Prob. 5OECh. 8.7 - Prob. 6OECh. 8.7 - Prob. 7OECh. 8.7 - Prob. 8OECh. 8.7 - Prob. 9OECh. 8.7 - Prob. 10OECh. 8.7 - Prob. 11OECh. 8.7 - Prob. 12OECh. 8.7 - Prob. 13OECh. 8.7 - Prob. 14OECh. 8.7 - Prob. 15OECh. 8.7 - Prob. 16OECh. 8.7 - Prob. 1WECh. 8.7 - Prob. 2WECh. 8.7 - Prob. 3WECh. 8.7 - Prob. 4WECh. 8.7 - Prob. 5WECh. 8.7 - Prob. 6WECh. 8.7 - Prob. 7WECh. 8.7 - Prob. 8WECh. 8.7 - Prob. 9WECh. 8.7 - Prob. 10WECh. 8.7 - Prob. 11WECh. 8.7 - Prob. 12WECh. 8.7 - Prob. 13WECh. 8.7 - Prob. 14WECh. 8.7 - Prob. 15WECh. 8.7 - Prob. 16WECh. 8.7 - Prob. 17WECh. 8.7 - Prob. 18WECh. 8.7 - Prob. 19WECh. 8.7 - Prob. 20WECh. 8.7 - Prob. 21WECh. 8.7 - Prob. 22WECh. 8.7 - Prob. 23WECh. 8.7 - Prob. 24WECh. 8.7 - Prob. 25WECh. 8.7 - Prob. 26WECh. 8.7 - Prob. 27WECh. 8.7 - Prob. 28WECh. 8.7 - Prob. 1MRECh. 8.7 - Prob. 2MRECh. 8.7 - Prob. 3MRECh. 8.7 - Prob. 4MRECh. 8.7 - Prob. 5MRECh. 8.7 - Prob. 6MRECh. 8.7 - Prob. 7MRECh. 8.7 - Prob. 8MRECh. 8.7 - Prob. 9MRECh. 8.7 - Prob. 10MRECh. 8.8 - Prob. 1OECh. 8.8 - Prob. 2OECh. 8.8 - Prob. 3OECh. 8.8 - Prob. 4OECh. 8.8 - Prob. 5OECh. 8.8 - Prob. 6OECh. 8.8 - Prob. 7OECh. 8.8 - Prob. 8OECh. 8.8 - Prob. 1WECh. 8.8 - Prob. 2WECh. 8.8 - Prob. 3WECh. 8.8 - Prob. 4WECh. 8.8 - Prob. 5WECh. 8.8 - Prob. 6WECh. 8.8 - Prob. 7WECh. 8.8 - Prob. 8WECh. 8.8 - Prob. 9WECh. 8.8 - Prob. 10WECh. 8.8 - Prob. 11WECh. 8.8 - Prob. 12WECh. 8.8 - Prob. 13WECh. 8.8 - Prob. 14WECh. 8.8 - Prob. 15WECh. 8.8 - Prob. 16WECh. 8.8 - Prob. 17WECh. 8.8 - Prob. 18WECh. 8.8 - Prob. 19WECh. 8.8 - Prob. 20WECh. 8.8 - Prob. 21WECh. 8.8 - Prob. 22WECh. 8.8 - Prob. 23WECh. 8.8 - Prob. 24WECh. 8.8 - Prob. 25WECh. 8.8 - Prob. 26WECh. 8.8 - Prob. 27WECh. 8.8 - Prob. 28WECh. 8.8 - Prob. 29WECh. 8.8 - Prob. 30WECh. 8.8 - Prob. 1ECh. 8.8 - Prob. 2ECh. 8.8 - Prob. 3ECh. 8.8 - Prob. 4ECh. 8.9 - Prob. 1OECh. 8.9 - Prob. 2OECh. 8.9 - Prob. 3OECh. 8.9 - Prob. 1WECh. 8.9 - Prob. 2WECh. 8.9 - Prob. 3WECh. 8.9 - Prob. 4WECh. 8.9 - Prob. 5WECh. 8.9 - Prob. 6WECh. 8.9 - Prob. 7WECh. 8.9 - Prob. 8WECh. 8.9 - Prob. 9WECh. 8.9 - Prob. 10WECh. 8.9 - Prob. 11WECh. 8.9 - Prob. 12WECh. 8.9 - Prob. 13WECh. 8.9 - Prob. 14WECh. 8.9 - Prob. 15WECh. 8.9 - Prob. 16WECh. 8.9 - Prob. 17WECh. 8.9 - Prob. 18WECh. 8.9 - Prob. 19WECh. 8.9 - Prob. 20WECh. 8.9 - Prob. 21WECh. 8.9 - Prob. 22WECh. 8.9 - Prob. 23WECh. 8.9 - Prob. 24WECh. 8.9 - Prob. 25WECh. 8.9 - Prob. 26WECh. 8.9 - Prob. 27WECh. 8.9 - Prob. 28WECh. 8.9 - Prob. 29WECh. 8.9 - Prob. 30WECh. 8.9 - Prob. 1CECh. 8.9 - Prob. 2CECh. 8.9 - Prob. 3CECh. 8.9 - Prob. 4CECh. 8.9 - Prob. 5CECh. 8.9 - Prob. 1STCh. 8.9 - Prob. 2STCh. 8.9 - Prob. 3STCh. 8.9 - Prob. 4STCh. 8.9 - Prob. 5STCh. 8 - Prob. 1CRCh. 8 - Prob. 2CRCh. 8 - Prob. 3CRCh. 8 - Prob. 4CRCh. 8 - Prob. 5CRCh. 8 - Prob. 6CRCh. 8 - Prob. 7CRCh. 8 - Prob. 8CRCh. 8 - Prob. 9CRCh. 8 - Prob. 10CRCh. 8 - Prob. 11CRCh. 8 - Prob. 12CRCh. 8 - Prob. 13CRCh. 8 - Prob. 1CTCh. 8 - Prob. 2CTCh. 8 - Prob. 3CTCh. 8 - Prob. 4CTCh. 8 - Prob. 5CTCh. 8 - Prob. 6CTCh. 8 - Prob. 7CTCh. 8 - Prob. 8CTCh. 8 - Prob. 9CT
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