- Forums
###### Quad Func Help

Watch

9 years ago

Stuck on some homework as the teacher was explaining it but not fully as there was about 10 minutes of the lesson left so it wasn't in depth teaching.

Just need some help or some steps on how to solve this question if anyone could help me

x^2-8x-29=(x+a)^2+b.

a) Find the value of A and the value of B

b) Hence, or otherwise, show that roots of-x^2-8x-29=0 are c+-droot5, where c and d are integers.

Just need some help or some steps on how to solve this question if anyone could help me

x^2-8x-29=(x+a)^2+b.

a) Find the value of A and the value of B

b) Hence, or otherwise, show that roots of-x^2-8x-29=0 are c+-droot5, where c and d are integers.

Original post by jshep000

Stuck on some homework as the teacher was explaining it but not fully as there was about 10 minutes of the lesson left so it wasn't in depth teaching.

Just need some help or some steps on how to solve this question if anyone could help me

x^2-8x-29=(x+a)^2+b.

a) Find the value of A and the value of B

b) Hence, or otherwise, show that roots of-x^2-8x-29=0 are c+-droot5, where c and d are integers.

Just need some help or some steps on how to solve this question if anyone could help me

x^2-8x-29=(x+a)^2+b.

a) Find the value of A and the value of B

b) Hence, or otherwise, show that roots of-x^2-8x-29=0 are c+-droot5, where c and d are integers.

Do you know what $(x-4)^2$ is

Original post by jshep000

Stuck on some homework as the teacher was explaining it but not fully as there was about 10 minutes of the lesson left so it wasn't in depth teaching.

Just need some help or some steps on how to solve this question if anyone could help me

x^2-8x-29=(x+a)^2+b.

a) Find the value of A and the value of B

b) Hence, or otherwise, show that roots of-x^2-8x-29=0 are c+-droot5, where c and d are integers.

Just need some help or some steps on how to solve this question if anyone could help me

x^2-8x-29=(x+a)^2+b.

a) Find the value of A and the value of B

b) Hence, or otherwise, show that roots of-x^2-8x-29=0 are c+-droot5, where c and d are integers.

a) x^2-8x-29=(x+a)^2+b.

use (x - 4)

compare answer with (x+a)^2+b.

b) x^2-8x-29=0

use

If ax² + bx + c = 0 then x = .

compare answer with c+-d root 5

Original post by Tutorsos

b) x^2-8x-29=0

use

If ax² + bx + c = 0 then x = .

compare answer with c+-d root 5

b) x^2-8x-29=0

use

If ax² + bx + c = 0 then x = .

compare answer with c+-d root 5

The point of completing the square is to find a solution by re-arranging the answer found in (a)

Original post by jshep000

I got x^2-8x-29=x^2+2ax+a^2+b

so 2ax must be -8. so a is -4? and -4^2 is 16. but i need -29. so b=-49?

for part B, i got x = 4±3√5

so 2ax must be -8. so a is -4? and -4^2 is 16. but i need -29. so b=-49?

for part B, i got x = 4±3√5

You seem to have an idea so

$x^2-8x-29 = (x-4)^2-16-29 = (x-4)^2 - 45$

The next part is correct so I assume that you did mean 45 not 49

Original post by TenOfThem

You seem to have an idea so

$x^2-8x-29 = (x-4)^2-16-29 = (x-4)^2 - 45$

The next part is correct so I assume that you did mean 45 not 49

$x^2-8x-29 = (x-4)^2-16-29 = (x-4)^2 - 45$

The next part is correct so I assume that you did mean 45 not 49

Yeah my bad it was -45, thanks for the prompt none the less

Original post by jshep000Stuck on some homework as the teacher was explaining it but not fully as there was about 10 minutes of the lesson left so it wasn't in depth teaching.

Just need some help or some steps on how to solve this question if anyone could help me

x^2-8x-29=(x+a)^2+b.

a) Find the value of A and the value of B

b) Hence, or otherwise, show that roots of-x^2-8x-29=0 are c+-droot5, where c and d are integers.

Just need some help or some steps on how to solve this question if anyone could help me

x^2-8x-29=(x+a)^2+b.

a) Find the value of A and the value of B

b) Hence, or otherwise, show that roots of-x^2-8x-29=0 are c+-droot5, where c and d are integers.

same bro.....

- Python getting the value of X when Y=0
- Maths help
- Sociology revision
- Sociology Question
- Best calculator for Maths GCSE?
- Assess the relationship between gender and crime (40 marker)
- Paper 2 2022 7th June
- bath uni accommodation
- Keble college Oxford Accomodation
- Breakdown sociology aqa paper 2 2022
- Bath uni accommodation
- St Andrews - Direction help!
- how to gain muscle at home?
- Sociology Questions
- Part a help differentiation
- Bath accomodation
- Lose weight
- Want to swap my quads accommodation for quieter accommodation
- Bath- Polden Accommodation
- Accommodation help

- Official University of the Arts London Applicant Thread for 2024
- Official University College London Applicant Thread for 2024
- A- level French!
- Lloyds Banking Group 2024 Graduate Scheme
- 2024 UK Drama School Auditions
- Central Saint Martins interview questions!
- Official Oxford 2024 Postgraduate Applicants Thread
- Stem futures imperial college London y10
- Imperial College London Aero/EEE MAT Test
- Official Veterinary Medicine Applicants thread 2024 entry
- Official Cambridge Postgraduate Applicants 2024 Thread
- Economics BSC with offers- Soton, Surrey, Sussex, Reading and Kent.
- Official University of Manchester Offer Holders Thread for 2024 entry
- Durham Law with Foundation
- Second degree in paramedic science
- Rothschild Pioneer Work Experience Programme 2024
- Rejection from Queen’s Univeristy Belfast
- Crowe Tax Graduate interview
- Official London School of Economics and Political Science 2024 Applicant Thread
- Official: St George's, University of London A100 2024 Entry

- Cambridge postgraduate application: Decision pending - application is under review
- 🚔 Q&A: Questions on policing as a career: Ask us anything!
- unis for vet med
- Bath vs Birmingham Pharmacy
- MPhil Politics and International Studies 2024
- Which university to consider for MSc Construction Project management for Sept 2024?
- Isaac Physics Summer Camp
- Uttley House (University of Manchester Accommodation)
- Feeling undervalued and unappreciated
- LSBU dental hygiene 2024
- Research project placement interview prep, biomed
- Toxic flatmates
- Official Thread: Graduate Entry Medicine 2024 Entry
- Tatakae L's GYG Journey
- Moving into student house with friends next year - What to expect?
- DWP Work Coach Interview - how long to hear
- Whos joining in march intake ?
- Ulster University graduate entry medicine 2024
- 2023 Spanish AQA paper 2
- Official: University of East Anglia (UEA) A100 2024 Entry

- UKMT Intermediate Math Challenge 2024 - Discussion
- GCSE Mathematics Study Group 2023-2024
- A-level Mathematics Study Group 2023-2024
- Mock set 4 paper 2 q14 a level maths (4 distinct points)
- STEP foundation module help pls
- Ukmt IMC 2024
- ukmt imc
- Confused on surds question
- HNC MATHS A2 Task 3 (Radio Transmitters)
- Is this a joke or am I actually missing something?

- UKMT Intermediate Math Challenge 2024 - Discussion
- GCSE Mathematics Study Group 2023-2024
- A-level Mathematics Study Group 2023-2024
- Mock set 4 paper 2 q14 a level maths (4 distinct points)
- STEP foundation module help pls
- Ukmt IMC 2024
- ukmt imc
- Confused on surds question
- HNC MATHS A2 Task 3 (Radio Transmitters)
- Is this a joke or am I actually missing something?

The Student Room and The Uni Guide are both part of The Student Room Group.

© Copyright The Student Room 2024 all rights reserved

The Student Room and The Uni Guide are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: Imperial House, 2nd Floor, 40-42 Queens Road, Brighton, East Sussex, BN1 3XB