Results are out! Find what you need...fast. Get quick advice or join the chat
Hey there Sign in to join this conversationNew here? Join for free

Complete The Square

Announcements Posted on
    • Thread Starter
    • 31 followers
    Offline

    ReputationRep:
    This is the question
    Click image for larger version. 

Name:	cts.gif 
Views:	37 
Size:	994 Bytes 
ID:	162294
    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.
    • 11 followers
    Offline

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

    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
    • 0 followers
    Offline

    ReputationRep:
    Your answer is correct.
    • 13 followers
    Offline

    ReputationRep:
    No
    • 10 followers
    Offline

    ReputationRep:
    (Original post by zed963)
    This is the question
    Click image for larger version. 

Name:	cts.gif 
Views:	37 
Size:	994 Bytes 
ID:	162294
    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.
    • 11 followers
    Offline

    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
    • 19 followers
    Offline

    ReputationRep:
    (Original post by zed963)
    This is the question
    Click image for larger version. 

Name:	cts.gif 
Views:	37 
Size:	994 Bytes 
ID:	162294
    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.

Reply

Submit reply

Register

Thanks for posting! You just need to create an account in order to submit the post
  1. this can't be left blank
    that username has been taken, please choose another Forgotten your password?
  2. this can't be left blank
    this email is already registered. Forgotten your password?
  3. this can't be left blank

    6 characters or longer with both numbers and letters is safer

  4. this can't be left empty
    your full birthday is required
  1. By joining you agree to our Ts and Cs, privacy policy and site rules

  2. Slide to join now Processing…

Updated: July 10, 2012
New on TSR

So how did you do?

Come into the GCSE forum to share your grades

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