Find the intervals on which the function is increasing or decreasing. f(x)=2x² + 3x - 12x+15 Cov List any interval(s) on which the function is increasing. Select the correct answer below and, if necessary fill in the answer box within your choice. A The function is increasing on the interval(s) Type your answer in interval notation. Use a comma to separate answers as needed) B. The function is never increasing