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I think I broke A Level Maths Watch

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    Ok, so you cant square root a negative number, but you can put a negative number to the power 1/2, which is the same as square rooting.

    i.e root -5 = ERROR. -5^1/2 = -2.2360...

    Obviously there is an explanation, and I would like somebody who might know the explanation to tell me
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    put (-5)
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    Its due to the order of operations, BODMAS or PEMDAS or whatever you call it. The exponent/power is calculated before multiplication/division, which is why you get an answer.

    Calculators will treat -5^{\frac{1}{2}} as -1 \times 5^{\frac{1}{2}}. If you try doing (-5)^{\frac{1}{2}} you won't get an answer (unless your calculator deals with complex numbers).
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    This does not explain why but if you do (-5)^(1/2) it comes up as error. And I was always told to make sure the thing I am raising to a power is in brackets therefore I think if you do -5 to the power of a half it is still an error.
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    I think what you did was square root 5 then multiplied by -1
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    LOOOOOOL, that just gives you the negative version of square root of 5.
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    Look, take 25 -> x*x (x must be same) gives you 25. So x can either be -5 or 5 it would give you positive 25. You can't have a positive and a negative combination that would give you negative 25. The answer is thus expressed in an imaginary unit.. complex numbers.

    But it's great that you're trying.

    Good luck! Love your curiosity.
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    (Original post by the.cookie.monster)
    I think what you did was square root 5 then multiplied by -1
    Nope.
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    (Original post by jkpmc)
    put (-5)
    YES! Nice one. I was getting worried then...
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    Ahh the title made my day..
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    I was gonna say use some glue but ok.
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    Yep you need to use brackets
 
 
 
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