PP Section 2.4

# PP Section 2.4 - InequalitiesPart2 SolvingInequalities...

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Inequalities – Part 2

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Solving Inequalities 3]. [1, is set solution that the see we 3 4 of graph at the Looking 2 + - = x x y 0 3 4 inequality the Solve 2 + - x x
We need an algebraic method to get that answer. We see that the expression on the left side equal zero  when  x = 3  or  x =1. We can use that information to construct a chart of  signs: 1 3 0 2 5 X-3          negative      negative        positive   X-1          negative      positive         positive     Product           positive          negative           positive Test points Sign of each expression  when test point is plugged  in 0 ) 1 )( 3 ( 0 3 4 2 - - + - x x x x

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1 3 X-3          negative      negative        positive   X-1          negative      positive         positive     Product         positive      negative       positive
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PP Section 2.4 - InequalitiesPart2 SolvingInequalities...

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