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UNIT 4  : POLYNOMIAL FUNCTIONS

LESSON 6: SOLVING POLYNOMIAL INEQUALITIES

 Interval Test Number - 3 - 1 5 Sign of (x + 2) ( - ) ( + ) ( + ) Sign of (x – 4) ( - ) ( - ) ( + ) Sign of (x + 2)(x – 4) ( + ) ( - ) ( + )

 Interval Test Number - 4 - 2.5 0 3 Sign of (x + 3) ( - ) ( + ) ( + ) ( + ) Sign of (x + 2) ( - ) ( - ) ( + ) ( + ) Sign of (x – 2) ( - ) ( - ) ( - ) ( + ) Sign of (x + 3)(x + 2)(x –4) ( - ) ( + ) ( - ) ( + )

 Interval Test Number - 3 0 4 Sign of (x + 2) ( - ) ( + ) ( + ) Sign of (x – 3) ( - ) ( - ) ( + ) Sign of (x + 2)/(x – 3 ) ( + ) ( - ) ( + )

 Interval Test Number - 3 - 1.5 0 4 6 Sign of (x – 3) ( - ) ( - ) ( - ) ( + ) ( + ) Sign of (x + 1) ( - ) ( - ) ( + ) ( + ) ( + ) Sign of (x – 5) ( - ) ( - ) ( - ) ( - ) ( + ) Sign of (x + 2) ( - ) ( + ) ( + ) ( + ) ( + ) (x – 3)(x + 1)/(x – 5)(x + 2) ( + ) ( - ) ( + ) ( - ) ( + )