February 23, 2017

Homework Help: Math

Posted by Amy~ on Wednesday, September 29, 2010 at 9:42pm.

I don't get when you use "or" or "and" in inequalities.

Like for this quadratic inequality:
x^(2) +x -12 > 0
becomes x < -4
x > 3

why is the answer {x|x<-4 or x>3} and not {x|3<x<-4} ?

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