Year 9
These resources will be removed by end of Summer Term 2025.
Switch to our new teaching resources now - designed by teachers and leading subject experts, and tested in classrooms.
Lesson details
Key learning points
- In this lesson, we will learn how we can factorise quadratics using an array.
Licence
This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.
Loading...
6 Questions
Q1.
Which expression is equivalent to a² - b² ?
(a - b)(a - b)
2ab
ab
Q2.
Match the expression equivalent to (x+4)(x-4).
x² - 16x
x² - 4
x² - 8x + 16
x² + 4²
Q3.
Match the expression equivalent to (x+9)(x-3).
x² - 3²
x² - 6²
x² + 3x - 27
Q4.
Which calculation would work out 64² - 4² ?
(8 x 2)²
60 x 60
72 x 6
Q5.
Match the expression equivalent to (x+25)-(x-25).
x² - 25
x² - 25²
x² + 5²
Q6.
Match the expression equivalent to (73+x)(73-x).
73 - x²
73 + x²
x² - 73
x² - 73²
6 Questions
Q1.
Fill in the gap: ________ is the opposite of expanding.
Increasing
Quadratics
Solving
Q2.
Factorise x² + 11x + 24.
(x+2)(x+12)
(x+5)(x+6)
(x+6)(x+4)
Q3.
Factorise x² + 14x + 24.
(x+3)(x+8)
(x+5)(x+6)
(x+6)(x+4)
Q4.
Factorise x² + 8x + 16.
(x+16)(x+1)
(x+4)(x+2)
(x+8)(x+2)
Q5.
Factorise x² - 25.
(x-5)
(x-5)²
(x+5)²
Option 5
Q6.
A quadratic expression x² + bx + 20 can be factorised. Find all the possible values for b when b is positive.
1 to 20
1, 20, 2, 10, 5, 4
15, 5