Khan/khan-exercises — Issue #9124: Compound inequalities - OR inequality and "All Real Numbers"
Author: KhanBugz
Created: 2011-12-20 20:32:41+00:00
State: open
Labels: chrome, win7, wrong-or-unclear

Reporter: pfdevmuller@gmail.com

Hi. I did a question that simplified to "b < -2 OR b > -2". The accepted answer was "All Real Numbers", which is not true, as b can not be equal to -2. Thus the answer should be "b != -2", right?

[compound_inequalities.html?seed=76&problem=0](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/compound_inequalities.html?seed=76&problem=0&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/compound_inequalities.html?seed=76&problem=0&debug&activity=%5B%5B%22correct-activity%22%2C%22%5C%22%3Cspan%20data-else-if%3D%5C%5C%5C%22IS_OR%20%26amp%3B%26amp%3B%20ALL_NUMBERS%5C%5C%5C%22%3EAll%20real%20numbers.%3C%2Fspan%3E%5C%22%22%2C142%5D%5D)

["All real numbers."]

Mozilla/5.0 (Windows NT 6.1) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.63 Safari/535.7

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