Join TSR now and get all your revision questions answeredSign up now

Complete The Square Watch

    • Study Helper
    • Thread Starter
    Offline

    3
    ReputationRep:
    This is the question
    Name:  cts.gif
Views: 66
Size:  994 Bytes
    However the answer in the back of the book is (x-0.5)^2+1.25
    I don't know what I am doing wrong any ideas.
    Offline

    0
    ReputationRep:
    You're right if the question is x^2-x+1
    • Study Helper
    • Thread Starter
    Offline

    3
    ReputationRep:
    (Original post by wcp100)
    You're right if the question is x^2-x+1

    Their answer seems to be for: x^2-x-1
    that wouldn't give +1.25 it would give -1.25
    Offline

    0
    ReputationRep:
    Your answer is correct.
    Offline

    0
    ReputationRep:
    No
    • TSR Support Team
    • Study Helper
    Offline

    3
    ReputationRep:
    (Original post by zed963)
    This is the question
    Name:  cts.gif
Views: 66
Size:  994 Bytes
    However the answer in the back of the book is (x-0.5)^2+1.25
    I don't know what I am doing wrong any ideas.
    You can check the answer yourself here:

    Expand (x-0.5)^2+1.25 and see what you get.
    Offline

    0
    ReputationRep:
    (Original post by zed963)
    that wouldn't give +1.25 it would give -1.25
    That's a good point, my stupid mistake. Sign error.

    x^2-x+1.5
    Offline

    3
    ReputationRep:
    (Original post by zed963)
    This is the question
    Name:  cts.gif
Views: 66
Size:  994 Bytes
    However the answer in the back of the book is (x-0.5)^2+1.25
    I don't know what I am doing wrong any ideas.
    the answer at the back is wrong . Your working out is 100% correct.
 
 
 
Poll
How are you feeling about Results Day?
Useful resources

Make your revision easier

Maths

Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

Equations

How to use LaTex

Writing equations the easy way

Student revising

Study habits of A* students

Top tips from students who have already aced their exams

Study Planner

Create your own Study Planner

Never miss a deadline again

Polling station sign

Thinking about a maths degree?

Chat with other maths applicants

Can you help? Study help unanswered threads

Groups associated with this forum:

View associated groups

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Quick reply
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.