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4MA1/1HR Jan 2021, Question 6: Rearranging Formulas

Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 1HR (Higher) · Calculator · 5 marks

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The question, in short

Three short algebra tasks: rearrange a formula for c, state the value of g⁰, and factorise the quadratic x² − 11x + 24.

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

Part (a) · 2 marks

Rearrange A = c/y − 5z to make c the subject.

  1. 1Add 5z to both sides: A + 5z = c/y
  2. 2Multiply both sides by y: c = y(A + 5z)

Answerc = y(A + 5z)

Part (b) · 1 mark

Write down the value of g⁰.

  1. 1Any number to the power of 0 is 1

Answer1

Part (c) · 2 marks

Factorise x² − 11x + 24.

  1. 1Find two numbers that multiply to 24 and add to −11
  2. 2−3 and −8
  3. 3(x − 3)(x − 8)

Answer(x − 3)(x − 8)

Stuck on a step? Read the free lesson: Rearranging Formulas

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