SOLUTION: What is the abosolute value of 12 - 5i?

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Question 4619: What is the abosolute value of 12 - 5i?
Answer by longjonsilver(2297) About Me  (Show Source):
You can put this solution on YOUR website!
you basically do Pythagoras' theorem on the numbers -5 and 12 --> you should always recognise a 5,12,13 (and the classic 3,4,5) right-angled triangle.

so, absolute value is sqrt%28%2812%29%5E2+%2B+%28-5%29%5E2%29
sqrt%28144+%2B+25%29
sqrt%28169%29
--> 13

jon