x + 0 = x x - 0 = x x(0) = 0 x(0) = undefined ...is this how you call it or is it no solution? x^0 = ??? What is x raised to the zero power? square root of 0 = ??? Not sure about this one either. If anyone knows of any other properties of zero I'm leaving out, please feel free to post them. It's been over a year since I last did this stuff and have to know it all for my class. I'm already a bit behind, so having to spend my own personal time catching up with the basics. Thanks for your help.