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Review: Quadratic Inequality
Explanation
In this question, we have an inequality in which x is not isolated, so we can work to
isolate it:
When we take the square root, there are two cases: x is positive, or x is negative.
Case I (positive): 
Case II (negative): 
We can make sense of these results by considering that x is not a fraction with an absolute
value of less than 1. Therefore, it must either be right of 1 on the number
line or left of -1.
The correct answer is (D).
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