Solve the inequality in terms of intervals and illustrate the solution set on the real number line.

25. (x 1)(x 2) > 0

27. 2x 2 + x 1

29. x 2 + x + 1 > 0

31. x 2 < 3

33. x 3 x 2 0

34. (x + 1)(x 2)(x + 3) 0

35. x 3 > x

36. x 3 + 3x < 4x 2

37. 1 x < 4

38. 3 < 1 x 1