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September 15, 2014

September 15, 2014

Posted by **kate** on Sunday, September 18, 2011 at 1:58am.

- algebra -
**MathMate**, Sunday, September 18, 2011 at 8:43amx^2>16

<=>

±x>4

<=>

+x>4 or -x>4

<=>

x∈(4,∞) or x∈(-∞-4)

<=>

x∈ (-∞,-4)∪(4,∞)

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