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    Please help by looking at the attachment attached.
    help me to disprove it while accepting the square of a negative number
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    (Original post by cmark)
    Please help by looking at the attachment attached.
    help me to disprove it while accepting the square of a negative number
    Look at line 2, already a mistake (not the only one), it should be:

    \pm \sqrt {-1}

    Then see how the rest of the lines make the same mistake.
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    I think it is because the square root of -1 is rt(-1) or -rt(-1) so when you make it to the end, you should get +/- (-1) = +/- (1) if you include the +/- sign throughout rather than only taking the "positive" value of rt(-1)
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    (Original post by BobFredric)
    I think it is because the square root of -1 is rt(-1) or -rt(-1) so when you make it to the end, you should get +/- (-1) = +/- (1) if you include the +/- sign throughout rather than only taking the "positive" value of rt(-1)
    Sup bob
 
 
 
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