SOLUTION: solve the polynomial inequality and graph the solution set on a real number line. Express the solution set in interval notation (x-3) (x+9)

SOLUTION: solve the polynomial inequality and graph the solution set on a real number line. Express the solution set in interval notation (x-3) (x+9) > 0

Question 402021: solve the polynomial inequality and graph the solution set on a real number line. Express the solution set in interval notation (x-3) (x+9) > 0
Answer by robertb(5830) (Show Source): You can put this solution on YOUR website!
The critical numbers of the inequality are -9 and 3.
At the interval (, -9), (Using the test number x = -10).
At the interval ( -9,3), (Using the test number x = 0).
At the interval (3, ), (Using the test number x = 4).
The critical numbers themselves are NOT part of the solution set.
Therefore the solution set is (, -9)U (3, ).

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