sqrt[x^2]
- To: mathgroup at smc.vnet.net
- Subject: [mg9726] sqrt[x^2]
- From: Zen at archer.com (ZenArcher)
- Date: Tue, 25 Nov 1997 00:06:22 -0500
- Organization: AT&T WorldNet Services
- Sender: owner-wri-mathgroup at wolfram.com
Well I know this is really elementary, but I just don't understand this result: sqrt[x^2]=sqrt[x^2] sqrt[4^2]=4 Why doesn't Mathematica tell me that the Square Root of x^2 is x, but it will tell me that the square root of 4^2 is 4?