Explanation Principle used: If the product of two algebraic expressions is zero, then at least one of the factors is equal to zero. That is If A B = 0 , then A = 0 or B = 0 . Procedure used: 1 . Find an equivalent inequality with P ( x ) on one side and 0 on the other. 2. Change the inequality symbol to an equal sign and solve the related equation; that is, solve P ( x ) = 0 . 3. Use the solutions to divide the x axis into intervals. Then select a test value from each interval and determine the sign of the polynomial on the interval. 4. determine the intervals for which the inequality is satisfied and write intervals notation or set builder notation for the solution set. Include the endpoints of the intervals in the solution set if the inequality symbol is ≤ or ≥ . Calculation: The given polynomial inequality is 11 − x 2 ≥ 0 . By the procedure mentioned above, find the solution set of the inequality. Change the inequality sign by an equal sign to form the equivalent equation as 11 − x 2 = 0 . In order to solve the equation, first factor it by groupingas follows. 11 − x 2 = 0 x 2 = 11 x = ± 11 The solution set of the equation is { − 11 , 11 } . The solutions divide the x axis into the intervals as ( − ∞ , − 11 ) , ( − 11 , 11 ) and ( 11 , ∞ ) . Find the sign of the polynomial on each interval by selecting test values as follows. Let the polynomial function be denoted as f ( x ) = 11 − x 2 . Obtain the sign of polynomial f ( x ) at x = − 6 on the interval ( − ∞ , − 11 )

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ISBN: 9780135962312

Author: BITTINGER

Publisher: PEARSON

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Chapter 4.6, Problem 34E

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To solve: The polynomial inequality 11−x2≥0.

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Chapter 4.6, Problem 33E

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The polynomial inequality 11 − x 2 ≥ 0 .

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