SOLUTION: Solve with complete explanation please. {{{ x^2 -1<0}}}

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Question 793980: Solve with complete explanation please.
+x%5E2+-1%3C0
Answer by tommyt3rd(5050) About Me  (Show Source):
You can put this solution on YOUR website!
+x%5E2+-1%3C0
factor to get
+%28x-1%29%28x%2B1%29%3C0
check intervals...
x<-1:
(-)(-) false
-1 (-)(+) true
x>1:
(+)(+) false
solution interval: (-1, 1)