think about it. You want
(-∞,-2)U(-2,2)(2,∞)
You have duplicated some intervals and overlapped them.
what is the domain in interval notation when the restrictions are x cannot = 2 and x cannot = -2?
I got (-infinity, 2) U (2,-infinity)
(-infinity, -2) U (-2, infinity)
but my math teacher marked this as wrong
2 answers
forgot the 2nd U. Should be
(-∞,-2)U(-2,2)U(2,∞)
(-∞,-2)U(-2,2)U(2,∞)