Melissa is using synthetic division to divide 3x3−x2−9x+7 by x−1 . which answer is correct? synthetic division. first line. negative 3 in the box, followed by the numbers 3, negative 1, negative 9 and 7. second line. starting under negative 1 in the top row, the numbers are negative 9, 30 and negative 63. third line. starting under 3 in the top row, the numbers are 3, negative 10, 21 and negative 56. synthetic division. first line. negative 1 in the box, followed by the numbers 3, negative 1, negative 9 and 7. second line. starting under negative 1 in the top row, the numbers are negative 3, 4 and 5. third line. starting under 3 in the top row, the numbers are 3, negative 4, negative 5 and 12. synthetic division. first line. 1 in the box, followed by the numbers 3, negative 1, negative 9 and 7. second line. starting under negative 1 in the top row, the numbers are negative 3, 2 and negative 7. third line. starting under 3 in the top row, the numbers are 3, 2, negative 7 and 0. synthetic division. first line. 3 in the box, followed by the numbers 3, negative 1, negative 9 and 7. second line. starting under negative 1 in the top row, the numbers are negative 9, 24 and 45. third line. starting under 3 in the top row, the numbers are 3, 8, 15 and 52.