Solve where x² + y² = r and x + y = 3 (substituting)
In this lesson, we will solve simultaneous equations by substituting a linear equation into a quadratic equation. Examples include quadratics of the form x² + y² = r and x + y = 3, where r can be a square number.
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:
- Click "Close Video"
- Click "Next" to view the activity
Your video will re-appear on the next page, and will stay paused in the right place.
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.
Lesson summary: Solve where x² + y² = r and x + y = 3 (substituting)
It looks like you have not completed one of the quizzes.
To share your results with your teacher please complete one of the quizzes.
Time to move!
Did you know that exercise helps your concentration and ability to learn?
For 5 mins...
Move around:
Climb stairs
On the spot:
Chair yoga