Edexcel A-Level Maths 2020 Paper 2 (Pure) Q4-Q6 | Walkthrough

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📺 WATCH THE FULL PAPER:    • Edexcel A-Level Maths 2020 Paper 2 (9MA0/0...  

In this video, Lee Guffick (former Head of Maths & A-Level Examiner) walks through Questions 4–6 from Edexcel A-Level Maths 2020 Paper 2 (Pure), step-by-step, explaining the key methods examiners are looking for.

You’ll cover:
✅ A binomial expansion coefficient problem
✅ Solving an exponential equation using algebra and logs
✅ Algebraic long division and integration using ln(x + a) (reverse chain rule)

Perfect for students aiming for A/A* who want clear exam technique, accurate working, and confidence under pressure.

⏱️ TIMESTAMPS:
0:00 – Introduction
0:02 – Q4 Binomial Expansion (Coefficient of x⁴ to find a)
2:15 – Q5 Exponentials (Solving 3·2ˣ = 15 − 2ˣ⁺¹ using algebra)
4:35 – Q6 Algebraic Long Division (Improper fraction into partial form)
7:08 – Q6 Integration (Exact area using ln and bounds 0 to 6)
10:23 – Final answer + exam advice / subscribe

✏️ TOPICS COVERED:

Binomial expansion: selecting the correct term (x⁴)

Using combinations (7 choose 4) and coefficient comparison

Solving exponential equations with algebraic rearrangement

Logarithms: exact solutions using log base 2

Algebraic long division of rational expressions

Integration using the reverse chain rule

Exact values involving ln(2)

💯 EXAM TIPS:

In binomial questions, always identify the power of x you need first — then match the powers so they sum correctly (here: 7 → x⁴ means a³)

With exponentials, collect like terms carefully and factorise to isolate 2ˣ

If the numerator’s highest power is larger than the denominator, it’s an improper fraction → use algebraic long division

For terms like 1/(x+2), integration leads to ln(x+2) — don’t forget exact bounds and log rules

📚 ABOUT GUFFICK TUITION:
Lee Guffick is a former Head of Mathematics and A-Level Examiner helping students achieve A/A grades* and secure places at top universities including Oxford, Cambridge, and the Ivy League.

These walkthroughs are designed to help you develop calm, structured exam technique — the difference between a B and an A, or an A and an A* is often in method and accuracy.

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📩 Email: [email protected]

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