2026 RI Promo Q2

2026 RI Promo Q2

Junior College 1
6 marks
  1. Solve the inequality \(\left|2x^2+5x-7\right|\leq 2x+7\) using an algebraic method.[4]
  2. Hence, solve the inequality \(\left|2x^2-5x-7\right|<-2x+7\).[2]

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Answer:(a) \(x=-\dfrac72\) or \(0\le x\le2\). (b) \(-2<x<0\).

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