Higher
Change the subject where the unknown appears twice
Higher
Change the subject where the unknown appears twice
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Lesson details
Key learning points
- In this lesson, we will be changing the subject of a formula in which the unknown appears twice.
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.
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3 Questions
Q1.
1. What is the solution set for 10x² + 33x - 7≤ 0?
![An image in a quiz](/_next/image?url=https%3A%2F%2Foaknationalacademy-res.cloudinary.com%2Fimage%2Fupload%2Fv1707209255%2Fp6flaisptpz5ldplqejy.png&w=1920&q=75)
A
B
C
Q2.
2. What is the solution set for 2x² + 2x – 30 < 5x + 24?
![An image in a quiz](/_next/image?url=https%3A%2F%2Foaknationalacademy-res.cloudinary.com%2Fimage%2Fupload%2Fv1707209258%2Fn7qmd562bicqg7crj8zd.jpg&w=1920&q=75)
A
B
C
Q3.
3. Which option is a quadratic inequality that has a solution set of {x: x >1.5 ∪ x < -0.5}?
![An image in a quiz](/_next/image?url=https%3A%2F%2Foaknationalacademy-res.cloudinary.com%2Fimage%2Fupload%2Fv1707209278%2Ft7v0ytbywcsnmlcvu0gw.jpg&w=1920&q=75)
A
B
D
3 Questions
Q1.
Make t the subject of the formula.
![An image in a quiz](/_next/image?url=https%3A%2F%2Foaknationalacademy-res.cloudinary.com%2Fimage%2Fupload%2Fv1707206614%2Fnikikimrynttqzk1pfde.png&w=1200&q=75)
A
C
D
Q2.
Make b the subject of the formula.
![An image in a quiz](/_next/image?url=https%3A%2F%2Foaknationalacademy-res.cloudinary.com%2Fimage%2Fupload%2Fv1707206616%2Fzwtya48j3b64ov1qzjne.png&w=1200&q=75)
A
C
Q3.
Make x the subject of the formula.
![An image in a quiz](/_next/image?url=https%3A%2F%2Foaknationalacademy-res.cloudinary.com%2Fimage%2Fupload%2Fv1707206619%2Fgza47pljfthphc9fijit.png&w=1200&q=75)
B
C