SOLUTION: solve this inequality, (x + 3)(x -4) < 7, and explain why it is incorrect

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Question 969305: solve this inequality, (x + 3)(x -4) < 7, and explain why it is incorrect
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!














Divide the -axis into three regions:







Pick a value from each interval: -4, 0, and 5 will do nicely.

Test each value in the original inequality:



Is a False statement.



Is a True statement.



Is a False statement.

Hence, the inequality is true for values of in the interval



Therefore, the solution set of the inequality is



John

My calculator said it, I believe it, that settles it