Factorisation of quadratic expression quiz Flashcards Preview

Expansion & Factorisation of Algebraic expressions > Factorisation of quadratic expression quiz > Flashcards

Flashcards in Factorisation of quadratic expression quiz Deck (11)
Loading flashcards...
1

Factorise

x2 + 3x + 2

The factors are only 1 * 2 and (-1) * (-2)

Since 1 + 2 = 3

The answer is 

(x + 1)(x + 2)

2

Factorise

x2 - 3x + 2

The factors are only 1 * 2 and (-1) * (-2)

Since (-1) + (-2) = -3

The answer is 

(x - 1)(x - 2)

3

Factorise

x2 + 6x + 8

The factors are

 1 *8 and (-1) * (-8)

2 * 4 and (2) * (-4) 

Since 2 + 4 = 6

The answer is 

(x + 2)(x + 4)

4

Factorise

x2 - 6x + 8

The factors are

 1 *8 and (-1) * (-8)

2 * 4 and (2) * (-4) 

Since (-2) + (-4) = -6

The answer is 

(x - 2)(x - 4)

5

Factorise

x2 + 7x + 12

The factors are

 1 * 12 and (-1) * (-12)

2 * 6 and (-2) * (-6)

3 * 4 and (-3) * (-4)

Since 3 + 4 = 7

The answer is 

(x + 3)(x + 4)

6

Factorise

x2 - 7x + 12

The factors are

 1 * 12 and (-1) * (-12)

2 * 6 and (-2) * (-6)

3 * 4 and (-3) * (-4)

Since (-3) + (-4) = -7

The answer is 

(x - 3)(x - 4)

7

Factorise

x2 + x - 12

The factors are

 1 * (-12) and (-1) * 12

2 * (-6) and (-2) * 6

3 * (-4) and (-3) * 4

Since (-3) + 4 = 1

The answer is 

(x - 3)(x + 4)

8

Factorise

x2 - x - 12

The factors are

 1 * (-12) and (-1) * 12

2 * (-6) and (-2) * 6

3 * (-4) and (-3) * 4

Since (3) + (-4) = -1

The answer is 

(x + 3)(x - 4)

9

Factorise

x2 - 4x - 12

The factors are

 1 * (-12) and (-1) * 12

2 * (-6) and (-2) * 6

3 * (-4) and (-3) * 4

Since 2 + (-6) = -4

The answer is 

(x + 2)(x - 6)

10

Factorise

x2 + 11x - 12

The factors are

 1 * (-12) and (-1) * 12

2 * (-6) and (-2) * 6

3 * (-4) and (-3) * 4

Since 12 + (-1) = 11

The answer is 

(x + 12)(x - 1)

11

Factorise

x2 - 11x - 12

The factors are

 1 * (-12) and (-1) * 12

2 * (-6) and (-2) * 6

3 * (-4) and (-3) * 4

Since 1 + (-12) = -11

The answer is 

(x - 12)(x + 1)