beachpanda
Badges: 12
Rep:
?
#1
Report Thread starter 1 month ago
#1
Is anyone able to help with the below Further Maths question?

I'm unsure if / where I've gone wrong in part i - but ended up with my signs different to the answer given in my textbook.
Attached files
0
reply
beachpanda
Badges: 12
Rep:
?
#2
Report Thread starter 1 month ago
#2
(Original post by beachpanda)
Is anyone able to help with the below Further Maths question?

I'm unsure if / where I've gone wrong in part i - but ended up with my signs different to the answer given in my textbook.
The textbook answer seems to be valid for substitution z = 2 + w

But I think my method was correct by using z = 2 - w as I did the same for other questions and they were fine?
0
reply
ghostwalker
  • Study Helper
Badges: 17
#3
Report 1 month ago
#3
(Original post by beachpanda)
Is anyone able to help with the below Further Maths question?

I'm unsure if / where I've gone wrong in part i - but ended up with my signs different to the answer given in my textbook.
Agree with your answer.

Sum of roots of original polynomial is -4/2= -2

So, sum of new roots is 6-(-2) = 8

So, new poly. will start 2x^3-16x^2+...
Last edited by ghostwalker; 1 month ago
1
reply
DFranklin
Badges: 18
Rep:
?
#4
Report 1 month ago
#4
I think you're right and the textbook is wrong. (Or at least I agree on the sign of the x^2 coeff, which is all I checked).
0
reply
mqb2766
Badges: 19
Rep:
?
#5
Report 1 month ago
#5
You're correct for i). Must be a book typo. Guess it's similar for ii).
Just chuck them into wolframalpha
0
reply
beachpanda
Badges: 12
Rep:
?
#6
Report Thread starter 1 month ago
#6
(Original post by ghostwalker)
Agree with your answer.

Sum of roots of original polynomial is -4/2= -2

So, sum of new roots is 6-(-2) = 8

So, new poly. will start 2x^3-16x^2+...
(Original post by DFranklin)
I think you're right and the textbook is wrong. (Or at least I agree on the sign of the x^2 coeff, which is all I checked).
(Original post by mqb2766)
You're correct for i). Must be a book typo. Guess it's similar for ii).
Just chuck them into wolframalpha
I was hoping so, thanks all!
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Back
to top
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

Do you have the space and resources you need to succeed in home learning?

Yes I have everything I need (195)
58.21%
I don't have everything I need (140)
41.79%

Watched Threads

View All