Simple Algebraic Division
Overview
When you learned to divide numbers at school, you started with short division and moved on to long division for bigger divisors. Polynomial division works the same way: given a cubic or quartic expression, you can split it into a simpler quotient and a remainder, just as 17 divided by 5 gives 3 remainder 2.
This topic teaches you the long division algorithm for polynomials, a skill you will use throughout Further Pure Mathematics. It connects directly to the factor theorem and to finding roots of higher-degree equations, making it one of the most practical algebraic tools in your toolkit.
Objectives
- Perform algebraic division by (x + a), (x - a), (ax + b) or (ax - b)
Mind map
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Flashcards
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Lesson Note
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Lesson Evaluation
Congratulations on completing the lesson on Simple Algebraic Division. Now that youve explored the key concepts and ideas, its time to put your knowledge to the test. This section offers a variety of practice questions designed to reinforce your understanding and help you gauge your grasp of the material.
You will encounter a mix of question types, including multiple-choice questions, short answer questions, and essay questions. Each question is thoughtfully crafted to assess different aspects of your knowledge and critical thinking skills.
Use this evaluation section as an opportunity to reinforce your understanding of the topic and to identify any areas where you may need additional study. Don't be discouraged by any challenges you encounter; instead, view them as opportunities for growth and improvement.
- When x^3 + 3x^2 - 10x - 24 is divided by (x - 3), the remainder is: A) 0 B) 6 C) -24 D) 12 Answer: A
- What must you do before dividing x^4 - 16 by (x - 2)? A) Factor x^4 - 16 first B) Insert 0x^3 + 0x^2 + 0x placeholders C) Multiply by -1 D) Nothing special is needed Answer: B
- When a polynomial f(x) is divided by (x + 1), the quotient is x^2 - x + 3 and the remainder is -2. What is f(x)? A) x^3 + 2x - 5 B) x^3 + 0x^2 + 4x + 1 C) x^3 + 0x^2 + 4x - 5 D) x^3 - 2x + 1 Answer: B
- If (x - 4) is a factor of x^3 - 6x^2 + 11x - 4, the remainder when dividing is: A) 4 B) -4 C) 1 D) 0 Answer: D
- When 6x^3 + 5x^2 - 3x - 2 is divided by (2x + 1), the leading term of the quotient is: A) 6x^2 B) 3x^2 C) 2x^2 D) x^2 Answer: B
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Practice Mock Questions
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