Unit 4-Mathematics

Question 1

2(2x+6)

Answer 1

4x+12

Question 2

4(7-2x)

Answer 2

28-8x

Question 3

2x(x+3y)

Answer 3

2x^2+6xy

Question 4

xy(2-3x)

Answer 4

2xy-3x^2y

Question 5

(x+3)(x+2)

Answer 5

x^2+5x+6

Question 6

(2x+1)(3x-2)

Answer 6

6x^2-x-2

Question 7

Factorise 3a+6

Answer 7

3(a+2)

Question 8

Factorise ab-2bc

Answer 8

b(a-2c)

Question 9

Factorise 3y^2-6xy

Answer 9

3y(y-2x)

Question 10

Factorise -2a+6ab

Answer 10

2a(3b-1)

Question 11

Factorise -2x^2-4x

Answer 11

-2x(x+2)

Question 12

Factorise x(x+4)-1(x+4)

Answer 12

(x+4)(x-1)

Question 13

The sum of 3 consecutive numbers is 78. Find the numbers.

Answer 13

25, 26, 27