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Mathematics
OpenStudy (anonymous):

I -3i I=?

jimthompson5910 (jim_thompson5910):

Hint: |a+bi| = sqrt(a^2+b^2)

jimthompson5910 (jim_thompson5910):

In your case, a = 0 and b = -3 since -3i is the same as 0-3i

OpenStudy (jamesj):

Draw this complex number out on the complex plane. How long is the line segment from the 'origin' (0+0i) to -3i ?

OpenStudy (anonymous):

3i

OpenStudy (jamesj):

length is always a real number

jimthompson5910 (jim_thompson5910):

The absolute value of any complex number is always a real number.

OpenStudy (anonymous):

3

jimthompson5910 (jim_thompson5910):

good, you got it

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