Edexcel A-Level Mathematics AS P2.2 Algebra and Functions Questions

Practise using polynomial division, remainders and factors to find constants, quotient forms and fully factorised expressions.

Syllabus
First assessment 2019
Course
Mathematics YMA01
Level
AS

Exam points

  • apply the remainder theorem to build equations for unknown coefficients in f(x)
  • divide by a linear factor to find Q(x) and the constant remainder

Question 1

[Maximum number: 6]

In this question you must show all stages of your working. Solutions relying on calculator technology are not acceptable.

f(x)=4x3+13x2−10x+8f(x)=4 x^{3}+13 x^{2}-10 x+8

Question (a)

(a)

When f(x) is divided by (x-2) the remainder is R and the quotient is Q(x).

[ 4 ]

Question (i)

(i)

Find Q(x).

[ 2 ]

Question (ii)

(ii)

Find R.

[ 2 ]

Question (b)

(b)

Use the factor theorem to show that (x+4) is a factor of f(x).

[ 2 ]

Question 2

[Maximum number: 5]
f(x)=4x3+px2+8x+q\mathrm{f}(x)=4 x^{3}+p x^{2}+8 x+q

where p and q are constants.
Given that
- ( 2 x+3 ) is a factor of f(x)
- f(x) has a remainder of -5 when divided by (x+2)

Question (a)

(a)

show that p=10

[ 4 ]

Question (b)

(b)

find the value of q.

[ 1 ]

Question 3

[Maximum number: 2]

In this question you must show all stages of your working.

Solutions relying entirely on calculator technology are not acceptable.

f(z)=z3−13z2+59z+pp∈Z\mathrm{f}(z)=z^{3}-13 z^{2}+59 z+p \quad p \in \mathbb{Z}

Given that z=3 is a root of the equation f(z)=0

show that p=-87

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