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FP3 vectors help ! Watch

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    I don't understand how they did 2b. Where did they get root(1+9) from?

    Q http://www.examsolutions.net/papers/...P3C.pdf?x65970

    MS http://www.examsolutions.net/papers/...CMS.pdf?x65970
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    (Original post by FHL123)
    I don't understand how they did 2b. Where did they get root(1+9) from?

    Q http://www.examsolutions.net/papers/...P3C.pdf?x65970

    MS http://www.examsolutions.net/papers/...CMS.pdf?x65970
    Factorise \sqrt{(10-a^2)}

     \sqrt{(10-a)^2+ 9(10-a)^2} = \sqrt{(10-a)^2} \cdot \sqrt{(1+9)}
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    (Original post by NotNotBatman)
    Factorise \sqrt{(10-a^2)}

     \sqrt{(10-a)^2+ 9(10-a)^2} = \sqrt{(10-a)^2} \cdot \sqrt{(1+9)}
    im still confused over this
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    (Original post by FHL123)
    im still confused over this
    actually its just clicked now- thanks !
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    (Original post by FHL123)
    im still confused over this
    Try

    sqaure root ( (Y sqaured) +(C x (Y sqaured) ), where Y = 10 - (a squared)
 
 
 
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