The symbol U means that we are going to do the Union of two sets, which means that we will take the elements of set A, and the elements of set B, and create a new set C that contains all the elements of A and B.
Therefore, if A = [-14, -8] and B = (-8, 10), the union of that two sets, represented by [-14, -8] U (-8, 10) will be
Final answer:
