This discussion is now closed.

Check out other Related discussions

- A little help with an Isaac Physics Q?
- AQA Level 2 Further Maths 2023 Paper 1 (8365/1) & Paper 2 (8365/2) [Exam Chat]
- Level 2 Further Maths - Post some hard questions (Includes unofficial practice paper)
- June 2018 Stats
- WJEC Unit 1 Maths As Level Discussion 15 May 2024
- When transforming a graph, does it matter which order you list the transformations?
- AQA Certificate in Further Mathematics Level 2 Paper 2 2361326 - 22 Jun 2022 [Chat]
- As level physics spring energy question
- A Level Maths Exam Question
- Maths A Level Coordinate Geometry Question
- C1 WTF moment type of question
- AQA Level 2 Further Maths 2024 Paper 2 (8365/2) - 19th June [Exam Chat]
- STEP maths I, II, III 1990 solutions
- Extra MAT 2023
- OCR A Level Mathematics B (MEI) Paper 3 (H640/03) - 20th June 2024 [Exam Chat]
- STEP 2016 Solutions
- STEP Maths I, II, III 2001 Solutions
- STEP maths I, II, III 1991 solutions
- Images of functions
- STEP 2006 Solutions Thread

prove by completing the square , that the roots of the equation x^2+2kx+c=0, where k and c are constants, are -k +/- root(k^2-c)

ive got it down to x+kx = root (kx-c) but now im lost... anyone please help?

ive got it down to x+kx = root (kx-c) but now im lost... anyone please help?

faa

prove by completing the square , that the roots of the equation x^2+2kx+c=0, where k and c are constants, are -k +/- root(k^2-c)

ive got it down to x+kx = root (kx-c) but now im lost... anyone please help?

ive got it down to x+kx = root (kx-c) but now im lost... anyone please help?

x^2 + 2kx + c = 0

=> (x + k)^2 - k^2 + c = 0 <-- think you may have gone wrong here

=> (x + k)^2 = k^2 - c (should be (x + k)^2 not (x + kx)^2)

=> (x + k) = +/- sqrt (k^2 - c)

=> x = -k +/- sqrt (k^2 - c)

Jenn xx

- A little help with an Isaac Physics Q?
- AQA Level 2 Further Maths 2023 Paper 1 (8365/1) & Paper 2 (8365/2) [Exam Chat]
- Level 2 Further Maths - Post some hard questions (Includes unofficial practice paper)
- June 2018 Stats
- WJEC Unit 1 Maths As Level Discussion 15 May 2024
- When transforming a graph, does it matter which order you list the transformations?
- AQA Certificate in Further Mathematics Level 2 Paper 2 2361326 - 22 Jun 2022 [Chat]
- As level physics spring energy question
- A Level Maths Exam Question
- Maths A Level Coordinate Geometry Question
- C1 WTF moment type of question
- AQA Level 2 Further Maths 2024 Paper 2 (8365/2) - 19th June [Exam Chat]
- STEP maths I, II, III 1990 solutions
- Extra MAT 2023
- OCR A Level Mathematics B (MEI) Paper 3 (H640/03) - 20th June 2024 [Exam Chat]
- STEP 2016 Solutions
- STEP Maths I, II, III 2001 Solutions
- STEP maths I, II, III 1991 solutions
- Images of functions
- STEP 2006 Solutions Thread

Latest

Trending