Solve the inequality , .

Answer and explanation

Correct answer: D.

  1. Step 1: Factorise: , with roots and . Step 2. The parabola opens upwards, so it is at or below zero between the roots: . **Answer: . Why not the others:** or is where the expression is at or above zero, uses the roots with the wrong signs, and includes values below , where the expression is positive.

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