Shouldn't it be $x\ge -1.999$ and $x\le -2.001$? Why wolfram alpha says $x>-1.999$?
http://www.wolframalpha.com/input/?i=|x%2B2|%3E%3D0.001
Sorry by the stupid question
Shouldn't it be $x\ge -1.999$ and $x\le -2.001$? Why wolfram alpha says $x>-1.999$?
http://www.wolframalpha.com/input/?i=|x%2B2|%3E%3D0.001
Sorry by the stupid question
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it must be $$x\leq -\frac{2001}{1000}\lor x\geq -\frac{1999}{1000}$$ it is equivalent to $$x^2+4x+4\geq \frac{1}{10^6}$$