Can someone provide step-by-step solutions to the problem? I provided the correct answer from my textbook so that you can check your answer. Thanks in advance!

In Exercises 38 ? 49, determine the intervals on which each function is a. concave upward and b. concave downward; then c. locate all points of inflection.Use the information gathered to sketch the function.Confirm the details with a graphing calculator.

3 45. f( X X +3x'+2x-545. a. (-3, too -3 . (-3,7