Factorising quadratics (Part 1)

In this lesson, we will learn how we can factorise quadratics using an array.

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.Which expression is equivalent to a² - b² ?

1/6

Q2.Match the expression equivalent to (x+4)(x-4).

2/6

Q3.Match the expression equivalent to (x+9)(x-3).

3/6

Q4.Which calculation would work out 64² - 4² ?

4/6

Q5.Match the expression equivalent to (x+25)-(x-25).

5/6

Q6.Match the expression equivalent to (73+x)(73-x).

6/6

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.Which expression is equivalent to a² - b² ?

1/6

Q2.Match the expression equivalent to (x+4)(x-4).

2/6

Q3.Match the expression equivalent to (x+9)(x-3).

3/6

Q4.Which calculation would work out 64² - 4² ?

4/6

Q5.Match the expression equivalent to (x+25)-(x-25).

5/6

Q6.Match the expression equivalent to (73+x)(73-x).

6/6

Video

Click on the play button to start the video. If your teacher asks you to pause the video and look at the worksheet you should:

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Worksheet

These slides will take you through some tasks for the lesson. If you need to re-play the video, click the ‘Resume Video’ icon. If you are asked to add answers to the slides, first download or print out the worksheet. Once you have finished all the tasks, click ‘Next’ below.

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Factorising Quadratics 1 Quiz

Show off what you know!

Q1.Fill in the gap: ________ is the opposite of expanding.

1/6

Q2.Factorise x² + 11x + 24.

2/6

Q3.Factorise x² + 14x + 24.

3/6

Q4.Factorise x² + 8x + 16.

4/6

Q5.Factorise x² - 25.

5/6

Q6.A quadratic expression x² + bx + 20 can be factorised. Find all the possible values for b when b is positive.

6/6

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Factorising Quadratics 1 Quiz

Show off what you know!

Q1.Fill in the gap: ________ is the opposite of expanding.

1/6

Q2.Factorise x² + 11x + 24.

2/6

Q3.Factorise x² + 14x + 24.

3/6

Q4.Factorise x² + 8x + 16.

4/6

Q5.Factorise x² - 25.

5/6

Q6.A quadratic expression x² + bx + 20 can be factorised. Find all the possible values for b when b is positive.

6/6

Lesson summary: Factorising quadratics (Part 1)

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