4MA1/1F Nov 2021, Question 13: Expanding Two Brackets
Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 1F (Foundation) · Calculator · 3 marks
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The question, in short
Simplify an index expression and expand and simplify a product of two binomials.
Summarised in our own words. Use the official paper for the exact wording and any diagrams.
Part (a) · 1 mark
Simplify e⁸ ÷ e².
- 1When dividing, subtract the powers
- 2e⁸ ÷ e² = e⁸⁻² = e⁶
Answere⁶
Part (b) · 2 marks
Expand and simplify (x − 3)(x + 1).
- 1(x − 3)(x + 1) = x² + x − 3x − 3
- 2x² − 2x − 3
Answerx² − 2x − 3
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