Can you explain #27 for me and give me the answers

25. x2 4 4x - 12 58. 26. 2 - 4 - 12 In Exercises 27-30, find (a) the intersection, and (b) the 59. union of the intervals. 27. [-1, 3] and (0. 4) 28. [-3. -1] and [-2. 2) In E 29. (-oo, 0) and (-2, 3] equa 30. [1. co) and [-3, 3) 61. In Exercises 31-56. use interval paid