Certain times you may be several intervals that can be turned into one interval. When these cases occur, you must make a number line and see the commonalities
Example
x < 2 U x > 4
an x > -2
Certain times you may be several intervals that can be turned into one interval. When these cases occur, you must make a number line and see the commonalities
x < 2 U x > 4
an x > -2