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Complete The Square

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    This is the question
    Name:  cts.gif
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    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.
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    You're right if the question is x^2-x+1
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    (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
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    Your answer is correct.
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    No
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    (Original post by zed963)
    This is the question
    Name:  cts.gif
Views: 53
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.
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    (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
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    (Original post by zed963)
    This is the question
    Name:  cts.gif
Views: 53
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.

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