What is (-∞, -3) U (-3, ∞) in inequality notation?

1 Answer
Shantelle
Jul 24, 2018

#x < -3# AND #x > -3#
or
#-3 < x < -3#

Explanation:

Since we know that parentheses (soft brackets) next to a number means that it is NOT including that number, we know that #-3# is not a solution.

It can be anything less than or greater than #-3#, but not #-3#, so the inequality can be written as:
#x < -3# AND #x > -3#
or
#-3 < x < -3#

Hope this helps!

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