Multiple choice If the equation x2 - 9x + m = 0 has only imaginary roots, find the value of m. m = 20 m = 20 or 25 m < 20 or 25 m > 20.25 None of these Reveal answer Fill a bubble to check yourself D Correct answer Explanation .b2 - 4ac < 0 81 - 4m < 0 m > 20.25