SOLUTION: the principal square root of 169 is 13. What is the other square root?

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Question 431730: the principal square root of 169 is 13. What is the other square root?
Found 2 solutions by Alan3354, Gersid:
Answer by Alan3354(69443) About Me  (Show Source):
Answer by Gersid(33) About Me  (Show Source):
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-13 since %2813%29%5E2+=+169 and %28-13%29%5E2+=+169