This discussion is now closed.
Check out other Related discussions
- Maths question help please circle
- Plane and line Geometry Question
- maths question integration
- Achieving an A* in CCEA A2 Maths
- AQA A-level Further Mathematics Paper 2 - 6th June 2025 [Exam Chat]
- Physics Problem Help
- 2025 Edexcel GCSE Maths Higher : Predicted topics for papers 2 & 3
- Edexcel A-level Further Mathematics Paper 2 - 22nd May 2025 [Exam Chat]
- A level Maths Circle Question
- A Level Maths Question
- Parametric Equations/ Range and Domain
- OCR GCSE Mathematics Paper 4 Calculator (Higher) - Thursday, May 15, 2025 [Exam Chat]
- Intersections of straight line and circles
- AQA Level 2 Further Mathematics Paper 2 (8365/2) - 18th June 2025 [Exam Chat]
- A level maths circles
- WJEC GCSE Mathematics Unit 1 Higher (3300U50-1) - 16th May 2024 [Exam Chat]
- Edexcel A Level Mathematics Paper 2 (9MA0 02) - 11th June 2024 [Exam Chat]
- Ellipses and eccentricity
- Surface area and volume
- Could i use a "math hack" video on my GCSE paper?
cartesian equation of a circle
when a questions asks you to find the cartesian equation of a circle, can you leave it in the form (x-a)^2 + (y-b)^2 = r^2 or do you have to expand it out?
Reply 1
no need for expantion, besides, this is a better form, as (a,b) is the centre, r is the radius, so it's easier to get information about the circle when it's in this form!
UNLESS the question says to show it in a specific form!
UNLESS the question says to show it in a specific form!
Reply 2
15
Freeway
when a questions asks you to find the cartesian equation of a circle, can you leave it in the form (x-a)^2 + (y-b)^2 = r^2 or do you have to expand it out?
Yeah, just leave in that form unless you have to multiply it out
Related discussions
- Maths question help please circle
- Plane and line Geometry Question
- maths question integration
- Achieving an A* in CCEA A2 Maths
- AQA A-level Further Mathematics Paper 2 - 6th June 2025 [Exam Chat]
- Physics Problem Help
- 2025 Edexcel GCSE Maths Higher : Predicted topics for papers 2 & 3
- Edexcel A-level Further Mathematics Paper 2 - 22nd May 2025 [Exam Chat]
- A level Maths Circle Question
- A Level Maths Question
- Parametric Equations/ Range and Domain
- OCR GCSE Mathematics Paper 4 Calculator (Higher) - Thursday, May 15, 2025 [Exam Chat]
- Intersections of straight line and circles
- AQA Level 2 Further Mathematics Paper 2 (8365/2) - 18th June 2025 [Exam Chat]
- A level maths circles
- WJEC GCSE Mathematics Unit 1 Higher (3300U50-1) - 16th May 2024 [Exam Chat]
- Edexcel A Level Mathematics Paper 2 (9MA0 02) - 11th June 2024 [Exam Chat]
- Ellipses and eccentricity
- Surface area and volume
- Could i use a "math hack" video on my GCSE paper?
Latest
Trending
Last reply 3 months ago
Methods of rationalisation of denominators of complex numberLast reply 3 months ago
Which A-level Maths/Further Maths topics gave you the most trouble?Posted 4 months ago
Pls help me pls im acc gonna die pls pls help me AS EDEXCEL MATHSLast reply 4 months ago
Grade Boundaries Edexcel Further Maths 3A 3C (FP1 & FM1)Last reply 4 months ago
Edexcel AS Level Maths May 15th 2025 Pure Paper 1 + Unofficial Mark SchemeMaths Study Help
68
160
How The Student Room is moderated
To keep The Student Room safe for everyone, we moderate posts that are added to the site.
