SOLUTION: What is the absolute value of | 2 + 7i |

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Question 1081246: What is the absolute value of | 2 + 7i |
Answer by ikleyn(52787) About Me  (Show Source):
You can put this solution on YOUR website!
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It is sqrt%282%5E2+%2B+7%5E2%29 = sqrt%2853%29.


On complex numbers see the introductory lessons
    - Complex numbers and arithmetical operations on them
    - Complex plane
    - Addition and subtraction of complex numbers in complex plane
    - Multiplication and division of complex numbers in complex plane
    - Raising a complex number to an integer power
in this site.

Also, you have this free of charge online textbook in ALGEBRA-II in this site
    - ALGEBRA-II - YOUR ONLINE TEXTBOOK.

The referred lessons are the part of this online textbook under the topic "Complex numbers".