Khan/khan-exercises — Issue #15533: Limits 2 - Answer is unclear
Author: KhanBugz
Created: 2012-03-06 10:52:38+00:00
State: open
Labels: firefox, wrong-or-unclear

Reporter: vishalthanki@gmail.com

I do not understand the part that how come (x-3)^2 will lead to zero in case x is moving on negative side of x axis. For example, if x is -3.1, (x-3)^2 will not be zero but will be (-6.1)^2 which will be 37.21. Am I missing something?

[limits_2.html?seed=184&problem=a-o-xmk2](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/limits_2.html?seed=184&problem=a-o-xmk2&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/limits_2.html?seed=184&problem=a-o-xmk2&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5C%22undefined%5C%22%22%2C57%5D%2C%5B%22hint-activity%22%2C%220%22%2C7%5D%2C%5B%22hint-activity%22%2C%220%22%2C11%5D%2C%5B%22hint-activity%22%2C%220%22%2C18%5D%5D)

["undefined"]

Mozilla/5.0 (X11; Linux x86_64; rv:10.0.2) Gecko/20100101 Firefox/10.0.2

MathJax is loaded, ready, queue length: 0

You should enable font download in your browser to improve the appearance of math expressions.