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flyingpig
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Homework Statement
Find the modulus of |z| for z = 4 + 3i
The Attempt at a Solution
z' = 4 - 3i
z'z = 25
[tex]\sqrt{25}[/tex] = plus or minus 5
My book and Mathematic only take positive roots, why?
flyingpig said:...
[tex]\sqrt{25}[/tex] = plus or minus 5
My book and Mathematic only take positive roots, why?
SammyS said:[tex]\sqrt{25} = +5[/tex]. That radical symbol denotes the principal square root, which is positive.
flyingpig said:Wow what?
That wasn't very nice of me, was it?flyingpig said:Wow what?
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