SOLUTION: How do I write the absolute value of t as an algebraic expression?

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Question 939713: How do I write the absolute value of t as an algebraic expression?
Answer by Edwin McCravy(20056) About Me  (Show Source):
You can put this solution on YOUR website!
How do I write |t| as an algebraic expression?
There are two ways:

(1) As the non-negative square root of a square

abs%28t%29%22%22=%22%22sqrt%28t%5E2%29

(2) As a piecewise function:

abs%28t%29+=+system%28matrix%282%2C3%2Ct%2Cif%2Ct%3E=0%2C-t%2Cif%2Ct%3C0%29%29+

Edwin