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What is the modulus of 7 - 8i?

Mathematics
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How do you do this?
what is modulus?
hard to explain, at least for me it is

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Other answers:

@mridrik Do you know how to find the modulus of the general form of complex numbers?
no
I know like 8 % 12 = 8 and stuff like that
OK no problem, let me give you an introduction to the modulus of complex numbers.
Let there be Z (a complex number ) = a + ib So , we have to find the modulus of Z = |Z| = |a+ib| It is given by |Z| = \(\sqrt{x^2+y^2}\)
oops sorry |Z| = \(\sqrt{a^2+b^2}\)
|dw:1350706728154:dw|
so positive radical 113?
|dw:1350706781969:dw|
so let us take the question itself as an example : |7-8i| = \(\sqrt{7^2+8^2}\)= \(\sqrt{49 + 64} = \sqrt{113}\)
Good work @mridrik , you're right!
right!
alright thanks, what were you drawing there unkle?
i plotted the point 7 - 8i on an Argand diagram, then used the Pythagorean relation to determine the distance form the origin of the point
from*
modulus is just the length of the vector
oh, okay

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