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4MA1/2F Jun 2018, Question 8: Expand and Simplify

Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 2F (Foundation) · Calculator · 5 marks

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The question, in short

Substitute g = −3 into 25 − 4g to get a value, then expand and simplify the expression x(2x + 1) + 3(x − 2) + 7.

Summarised in our own words. Use the official paper for the exact wording and any diagrams.

Part (a) · 2 marks

Work out 25 − 4g when g = −3.

  1. 125 − 4 × (−3)
  2. 225 + 12
  3. 337

Answer37

Part (b) · 3 marks

Multiply out and collect like terms in x(2x + 1) + 3(x − 2) + 7.

  1. 1x(2x + 1) = 2x² + x
  2. 23(x − 2) = 3x − 6
  3. 32x² + x + 3x − 6 + 7
  4. 42x² + 4x + 1

Answer2x² + 4x + 1

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