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O-LevelAdditional MathematicsEquations, inequalities and graphs4037/22 · May/June 2025 · Q14 Marks

Solve the inequality |5x+2|≥3.

Mark scheme

Marking points from the official mark scheme (May/June 2025). The mark or mark type is shown in brackets.

  1. [M1] 5x+2*3 and 5x+2*-3 oe where * could be = or any inequality sign
  2. [A2] Critical values: 1/5, -1 soi (A1 for one correct value)
  3. [A1] x≤-1 x≥1/5 oe mark final answer

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About this question

Topic
Equations, inequalities and graphs, O-Level Additional Mathematics (syllabus 4037). Structured question, 4 marks.
Source
O-Level Additional Mathematics, May/June 2025 Paper 2 Variant 2, question 1.

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