June 2013 p33 q1
1471
Solve the inequality: \(|4x + 3| > |x|\)
Solution
To solve the inequality \(|4x + 3| > |x|\), we consider two cases based on the definition of absolute value.
Case 1: \(4x + 3 > x\)
Simplify to get \(3x + 3 > 0\), which gives \(x > -1\).
Case 2: \(4x + 3 < -x\)
Simplify to get \(5x < -3\), which gives \(x < -\frac{3}{5}\).
Combining both cases, the solution is \(x < -1\) or \(x > -\frac{3}{5}\).
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