Enter a and bi piece:

a =  bi =

Enter c and di piece:

c =  di =
              

Answer
Success!
|8 - 5i| = 9.4339811320566

↓Steps Explained:↓

Evaluate this complex number absolute value

|8 - 5i|

Define the complex absolute value:

On the number line
Distance from 0 to that number. |a + bi| = √a2 + b2

Given a = 8 and b = -5, we have:

|8 - 5i| = √a2 + b2

|8 - 5i| = √82 + -52

|8 - 5i| = √64 + 25

|8 - 5i| = √89

Final Answer

|8 - 5i| = 9.4339811320566
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