4MA1/2FR Jan 2021, Question 20: Solving Quadratics by Factorising
Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 2FR (Foundation) · Calculator · 3 marks
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The question, in short
Solve the quadratic equation x² − 21x + 20 = 0, showing working clearly.
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Solution · 3 marks
- 1(x − 20)(x − 1) = 0
- 2x − 20 = 0 or x − 1 = 0
- 3x = 20 or x = 1
Answer1, 20
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