SOLUTION: What are the Interval Notation of -45-21x+x^2+x^3 ≥0
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Question 958643: What are the Interval Notation of -45-21x+x^2+x^3 ≥0
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
Break up the number line using the critical points of the left hand side.
and
Region 1 :
Region 2 :
Region 3 :
Choose a point in each region, test the inequality.
Region 1 :
False, so region 1 is not part of the solution region.
Region 2 :
False, so region 2 is not part of the solution region.
Region 3 :
True, so region 3 is part of the solution region.
.
.
.
In interval notation,
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