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Could anyone check whether these rearranged formulae are correcr Watch

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    Hi, could anyone check whether these rearranged formulae are correct (rearranged for x btw). Thanks
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    I have realised that I20 is cut off at the bottom, sorry.
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    For the second document (in your first post), check the fourth line and last line.
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    (Original post by simon0)
    For the second document (in your first post), check the fourth line and last line.
    I wasn't quite sure how to cross multiply the T, should it be on the left of the square root?
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    (Original post by etel)
    I wasn't quite sure how to cross multiply the T, should it be on the left of the square root?
    Sort of yes, multiply both sides by "t", as an example:

     \displaystyle \sqrt{ \frac{a}{b} }= c + \frac{d}{t} \quad \Leftrightarrow \quad t \sqrt{ \frac{a}{b} } = ct + d, \mbox{where} \, \, t \neq 0.
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    (Original post by simon0)
    Sort of yes, multiply both sides by "t", as an example:

     \displaystyle \sqrt{ \frac{a}{b} }= c + \frac{d}{t} \quad \Leftrightarrow \quad t \sqrt{ \frac{a}{b} } = ct + d, \mbox{where} \, \, t \neq 0.
    Ah okay, if there wasn't a sqrt then would it be
    Thanks
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    The first one:

     \displaystyle t \frac{a}{b} = \frac{at}{b}.

    As an example:

     2 \left( \frac{1}{2} \right) = \frac{2}{2} = 1.
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    (Original post by simon0)
    The first one:

     \displaystyle t \frac{a}{b} = \frac{at}{b}.

    As an example:

     2 \left( \frac{1}{2} \right) = \frac{2}{2} = 1.
    Ah okay thanksss
 
 
 
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