Solve the inequality using a number line and the behavior of the graph at each zero. Write your answer in interval notation. (x + 3)(x - 4)

Question

Solve the inequality using a number line and the behavior of the graph at each zero. Write your answer in interval notation. (x + 3)(x - 4) < 0
A) x $\in$ [-3, 4]
B) x $\in$ (-3, 4)
C) x $\in$ (-?, -3] $\cup$  [4, ?)
D) x $\in$ (-?, -3) $\cup$  (4, ?)

Quizplus · Accepted Answer

The inequality (x + 3)(x - 4) < 0 is satisfied when x is between -3 and 4, but not including -3 and 4 themselves, hence the correct interval notation is (-3, 4).

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