Solving Quadratic Equations by Factorisation

The solutions of the quadratic equation
x²-5x+6=0 are

• x=1 or x=-6
• x=3 or x=2
• x=-3 or x= 2
• x=-1 or x=6

The solution of the quadratic equation
4x²-5x-9=0 are

• x=-1 or x=9/4
• x=1 or x=9/4
• x=2 or x=3
• x=-2 or x=-3

• A

• B

• C

• D

Which is another way of correctly expressing
 (x  - 3)(x - 3)?

• (x² - 3²)
• (x² - 3)
• (x + 3)(x - 3)
• (x - 3)²

( x - 1 ) ( x + 3 ) = 0
so, the roots are 1 and

• 0
• -1
• 3
• -3

By using factorisation method, the roots of 2x² - x - 15 = 0 are

• -2.5 and 3
• 2.5 and -3
• 2.5 and 3
• -2.5 and -3

FACTORISE

m² + 3m + 2

• (m + 2)(m + 3)

• (m + 2)(m + 1)

• (m + 3)

• (m + 4)(m - 3)

Factorise the expression:

x² + 5x + 6

• (x + 3)(x + 2)

• (x + 2)(x - 3)

• (x + 5)(x + 1)

• (x - 2)(x - 3)

Factorise the expression:

x² + 10x + 9

• (x + 4)(x + 5)

• (x + 1)(x + 9)

• (x - 1)(x + 10)

• (x + 3)(x + 6)

Factorise the expression:

x² - 7x + 12

• (x + 3)(x + 4)

• (x - 3)(x - 4)

• (x - 3)(x + 4)

• (x + 3)(x - 4)