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    How do you work on a completing the square in c1 when there is a surd at the end of finding x or y
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    (Original post by Fred Bosire)
    How do you work on a completing the square in c1 when there is a surd at the end of finding x or y
    please post a photo of a question
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    (Original post by Fred Bosire)
    How do you work on a completing the square in c1 when there is a surd at the end of finding x or y
    Give us an example of a question.
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    (Original post by Fred Bosire)
    How do you work on a completing the square in c1 when there is a surd at the end of finding x or y
    In C1 if you get surds in your results they should be stated as simplified exact surd solutions

    x^2-6x-4=0
    Complete the square
    (x-3)^2 -13 =0
    Add 13 to both sides
    (x-3)^2 = 13
    Square root both sides
    x-3= + or - root(13)
    Add 3 to both sides
    x=3 + root(13) or 3 - root(13)

    If you have to sketch the curve then it crosses the x axis at the two solutions above
    you should see that root(13) is bigger than 3 so that 3-root(13) is on the negative side of the x axis
    You should state the coordinates of the crossing points and/or mark the axis with the exact surd solutions.


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    Thank you gunner 42.... That cleared things up for me
 
 
 
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