D Question 28 10 pts Let f (x) = 23 -12x2 - 15x + 26. a. Use the Rational Roots Theorem and synthetic division to factor f (x). b. Graph f (r) and label the x and y intercepts. c. Determine where f () > 0, and use interval notation for your solution. Create one PDF file that contains your work and solutions for questions #23-31, and upload it into question #31. You may also email your PDF file to your professor within 10 minutes of the close of your exam