Maths

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    (Original post by RDKGames)
    Yes it is. I'm showing multiplication by the conjugate of it.
    Ah yes of course.
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    (Original post by RDKGames)
    Close.
    My numerator factors were -42√2, 153, -56 and 102√2
    Did you get the same?
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    (Original post by Elisa2000)
    Look, minus sqrt 2 and sqrt 2 when multiplied make minus 2
    Look what?? You're right. -\sqrt{2} \sqrt{2}=-2
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    (Original post by Notch)
    My numerator factors were -42√2, 153, -56 and 102√2
    Did you get the same?
    Yeah I did. Your answer is still remarkably wrong. Check it.
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    (Original post by RDKGames)
    Yeah I did. Your answer is still remarkably wrong. Check it.
    Well 153 - 56 = 97 and 102√2 - 42√2 = 60√2
    and the denominator is 1... I don't see where I went wrong
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    (Original post by RDKGames)
    Look what?? You're right. -\sqrt{2} \sqrt{2}=-2
    Exactly, so you take that away from 211 ( 153 + 28)
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    (Original post by Notch)
    Well 153 - 56 = 97 and 102√2 - 42√2 = 60√2
    the denominator is 1, so?
    Yeah. Can you see how different it is to:


    (Original post by Notch)
    If you want my answer:
    Spoiler:
    Show
    I got 97 - 60√2
    ?
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    loool gotcha, the worst part is i wrote it down as 97 + 60√2 ;_;
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    (Original post by RDKGames)
    Yeah I did. Your answer is still remarkably wrong. Check it.
    Where did you get the -56 from???
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    (Original post by Elisa2000)
    Exactly, so you take that away from 211 ( 153 + 28)
    No. You misunderstand the calculation.

    153-28\sqrt{2}\sqrt{2}=153+28(-\sqrt{2}\sqrt{2})=153+28(-2)=153+(-56)=153-56
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    I got  \frac{97+60\sqrt{2}}{1}
    I could plug it into a calculator and check but I'm too lazy.
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    (Original post by RDKGames)
    No. You misunderstand the calculation.

    153-28\sqrt{2}\sqrt{2}=153+28(-\sqrt{2}\sqrt{2})=153+28(-2)=153+(-56)=153-56
    How come you are multiplying the -2 ?
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    (Original post by XOR_)
    I got  \frac{97+60\sqrt{2}}{1}
    I could plug it into a calculator and check but I'm too lazy.
    well done
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    (Original post by Elisa2000)
    How come you are multiplying the -2 ?
    You are multiplying 28 by -\sqrt{2}\sqrt{2}

    We have established that -\sqrt{2}\sqrt{2} is equal to -2

    So we are multiplying 28 by -2.
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    (Original post by RDKGames)
    You are multiplying 28 by -\sqrt{2}\sqrt{2}

    We have established that -\sqrt{2}\sqrt{2} is equal to -2

    So we are multiplying 28 by -2.
    Okay
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    (Original post by Elisa2000)
    What is 51-14 sqrt 2 divided by 3 -2 sqrt 2
    :iiam:
 
 
 
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