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​Q9: Answers – Paper 3 – November 2018

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Content:
Part A

• Expanding Triple Brackets​

Part B

• Indices Multiplication
• Indices Division

Part C

• The Quadratic Formula: Finding Roots – Part 1
• The Quadratic Formula: Finding Roots – Part 2​

Quizzes:
​Part A

• Expanding Triple Brackets

Part B

• Indices Multiplication
• Indices Division

Part C

• The Quadratic Formula

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Mark Scheme

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Working
a) Expand and simplify (x – 2)(2x + 3)(x + 1)

b) Find the value of n.

c) Solve 5x² – 4x – 3 = 0

Give your solutions correct to 3 significant figures.

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Question

9 a) Expand and simplify (x – 2)(2x + 3)(x + 1)

[3 marks]
​

b) Find the value of n.

[2 marks]
​

c) Solve 5x² – 4x – 3 = 0

Give your solutions correct to 3 significant figures.

[3 marks]

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