Interpreting Quadratic Expressions

x² + 4x - 5, What two numbers multiply together to give -5 but when added together give 4 ?

• 2 and 2

• -5 and 1

• 1 and 5

• -1 and 5

x² + 4x - 21, What two numbers multiply together to give -21 but when added together give 4 ?

• -1 and 21

• -3 and 7

• -7 and -3

• -7 and 3

x² + 2x - 15, What two numbers multiply together to give -15 but when added together give 2 ?

• -3 and 5

• 3 and -5

• -1 and 15

• -15 and 1

x² - 5x + 6, What two numbers multiply together to give 6 but when added together give -5 ?

• -1 and -4

• 1 and 6

• -2 and -3

• 2 and 3

x² - 9x + 14, What two numbers multiply together to give 14 but when added together give -9 ?

• -9 and 1

• 1 and -9

• -2 and -7

• 2 and 7

Factorise x² + 5x + 6

• (x+2)(x+3)

• (x+1)(x+6)

• (x+1)(x+5)

• (x-1)(x+6)

Factorise x² + 12x + 20

• (x+1)(x+20)

• (x+1)(x+11)

• (x+2)(x+10)

• (x+4)(x+5)

Factorise x² + x - 12

• (x+3)(x+4)

• (x-3)(x+4)

• (x-2)(x+6)

• (x-2)(x-6)

Factorise x² + 4x - 21

• (x-2)(x+2)

• (x-1)(x+21)

• (x-3)(x+7)

• (x+3)(x+7)

Factorise x² - 5x +6

• (x-1)(x-5)

• (x-2)(x-3)

• (x+2)(x-3)

• (x+2)(x+3)