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    Just working through the P1 thing, and I'm stuck on this excerise.
    NOTE: For the below # is the square root /surd sign.
    These are all RATIONALISING THE DENOMINATOR.

    PROBLEM A
    1 / #3 - 1
    I changed this and ended up with
    1 (-1 - #3) / -1 + #3 (-1 - #3)
    Which i then worked to get
    -1 - #3 / - 2
    Is there anything else to do?

    PROBLEM B
    #43 - #23 / #43 + #23
    What???????
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    (Original post by virtuality)
    Just working through the P1 thing, and I'm stuck on this excerise.
    NOTE: For the below # is the square root /surd sign.
    These are all RATIONALISING THE DENOMINATOR.

    PROBLEM A
    1 / #3 - 1
    I changed this and ended up with
    1 (-1 - #3) / -1 + #3 (-1 - #3)
    Which i then worked to get
    -1 - #3 / - 2
    Is there anything else to do?

    PROBLEM B
    #43 - #23 / #43 + #23
    What???????
    a) Yes, this can be further simplified:

    -1 - #3 / - 2 = (1+√3)/2

    b) (√43 - √23)/(√43+√23)

    multiply top and bottom by (√43-√23)
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    (√43 - √23)(√43 - √23)
    How you do that?
    Whats √43 x - √23??
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    (Original post by virtuality)
    (√43 - √23)(√43 - √23)
    How you do that?
    Whats √43 x - √23??
    Remember, √a * √b = √(ab)

    So,

    (√43 - √23)(√43 - √23) = 43 - 2√989 - 23 = 20 - 2√989
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    whats command for the sqrt sign ? alt + some numbers ?
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    (Original post by Revelation)
    whats command for the sqrt sign ? alt + some numbers ?
    you cant do that, the best you can do is use the character map (its unicode 221A by the way)
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    thats so tedious D:
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    (Original post by Revelation)
    thats so tedious D:
    Copy and paste instead.
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    thats easy now but what if it aint there, oh well ill just use sqrt(x)
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    (Original post by Revelation)
    thats easy now but what if it aint there, oh well ill just use sqrt(x)
    Character map.
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    mmm... but character map is so far away (see above)
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    use my signature :cool:
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    lol thanks
 
 
 
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