A quadratic inequality such as x 2 + 2x - 8 < 0 can be solved by

Question:

A quadratic inequality such as x² + 2x - 8 < 0 can be solved by first solving the related quadratic equation x² + 2x - 8 = 0, identifying intervals determined by the solutions of this equation, and then using a test value from each interval to determine which intervals form the solution set.

Graph ƒ(x) = x² + 2x - 8.

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