Expanding brackets

Mark scheme and answers · Total marks: 50

Question 1 [1 mark]

8x + 12

Mark scheme
  • A [1] — cao 8x + 12

Accept algebraically equivalent correct forms.

Question 2 [1 mark]

15x - 10

Mark scheme
  • A [1] — cao 15x - 10

Accept algebraically equivalent correct forms.

Question 3 [1 mark]

-10x - 2

Mark scheme
  • A [1] — cao -10x - 2

Accept algebraically equivalent correct forms.

Question 4 [1 mark]

6x + 42

Mark scheme
  • A [1] — cao 6x + 42

Accept algebraically equivalent correct forms.

Question 5 [1 mark]

12x - 15

Mark scheme
  • A [1] — cao 12x - 15

Accept algebraically equivalent correct forms.

Question 6 [1 mark]

-6x + 12

Mark scheme
  • A [1] — cao -6x + 12

Accept algebraically equivalent correct forms.

Question 7 [1 mark]

14x + 21

Mark scheme
  • A [1] — cao 14x + 21

Accept algebraically equivalent correct forms.

Question 8 [1 mark]

18x - 2

Mark scheme
  • A [1] — cao 18x - 2

Accept algebraically equivalent correct forms.

Question 9 [1 mark]

-15x + 10

Mark scheme
  • A [1] — cao -15x + 10

Accept algebraically equivalent correct forms.

Question 10 [1 mark]

16x + 40

Mark scheme
  • A [1] — cao 16x + 40

Accept algebraically equivalent correct forms.

Question 11 [2 marks]

6x² + 8x

Mark scheme
  • A [2] — cao 6x^2 + 8x

Accept algebraically equivalent correct forms.

Question 12 [2 marks]

6x² - 15x

Mark scheme
  • A [2] — cao 6x^2 - 15x

Accept algebraically equivalent correct forms.

Question 13 [2 marks]

-4x² - 2x

Mark scheme
  • A [2] — cao -4x^2 - 2x

Accept algebraically equivalent correct forms.

Question 14 [2 marks]

4x² + 12x

Mark scheme
  • A [2] — cao 4x^2 + 12x

Accept algebraically equivalent correct forms.

Question 15 [2 marks]

10x² - 5x

Mark scheme
  • A [2] — cao 10x^2 - 5x

Accept algebraically equivalent correct forms.

Question 16 [2 marks]

-6x² - 10x

Mark scheme
  • A [2] — cao -6x^2 - 10x

Accept algebraically equivalent correct forms.

Question 17 [2 marks]

6x² - 7x

Mark scheme
  • A [2] — cao 6x^2 - 7x

Accept algebraically equivalent correct forms.

Question 18 [2 marks]

9x² + 6x

Mark scheme
  • A [2] — cao 9x^2 + 6x

Accept algebraically equivalent correct forms.

Question 19 [2 marks]

-6x² + 12x

Mark scheme
  • A [2] — cao -6x^2 + 12x

Accept algebraically equivalent correct forms.

Question 20 [2 marks]

10x² + 6x

Mark scheme
  • A [2] — cao 10x^2 + 6x

Accept algebraically equivalent correct forms.

Question 21 [2 marks]

10x² - 6x

Mark scheme
  • M [1] — expands both bracketed terms correctly
  • A [1] — cao 10x^2 - 6x

Accept algebraically equivalent correct forms.

Question 22 [2 marks]

4x² - 9x

Mark scheme
  • M [1] — expands both bracketed terms correctly
  • A [1] — cao 4x^2 - 9x

Accept algebraically equivalent correct forms.

Question 23 [2 marks]

6x² - 2x

Mark scheme
  • M [1] — expands both bracketed terms correctly
  • A [1] — cao 6x^2 - 2x

Accept algebraically equivalent correct forms.

Question 24 [2 marks]

-4x² + 11x

Mark scheme
  • M [1] — expands both bracketed terms correctly
  • A [1] — cao -4x^2 + 11x

Accept algebraically equivalent correct forms.

Question 25 [2 marks]

-x² - 5x

Mark scheme
  • M [1] — expands both bracketed terms correctly
  • A [1] — cao -x2 - 5x

Accept algebraically equivalent correct forms.

Question 26 [2 marks]

10x² - 8x

Mark scheme
  • M [1] — expands both bracketed terms correctly
  • A [1] — cao 10x^2 - 8x

Accept algebraically equivalent correct forms.

Question 27 [2 marks]

x² - 4x

Mark scheme
  • M [1] — expands both bracketed terms correctly
  • A [1] — cao x2 - 4x

Accept algebraically equivalent correct forms.

Question 28 [2 marks]

10x² + x

Mark scheme
  • M [1] — expands both bracketed terms correctly
  • A [1] — cao 10x^2 + x

Accept algebraically equivalent correct forms.

Question 29 [2 marks]

4x² - 8x

Mark scheme
  • M [1] — expands both bracketed terms correctly
  • A [1] — cao 4x^2 - 8x

Accept algebraically equivalent correct forms.

Question 30 [2 marks]

5x² - 6x

Mark scheme
  • M [1] — expands both bracketed terms correctly
  • A [1] — cao 5x^2 - 6x

Accept algebraically equivalent correct forms.

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