189
7, 3, and -3.
189
189
3 x 63 = 189 3 + 63 = 66
To find what you multiply to get 63, you can consider its factors. The pairs of numbers that multiply together to give 63 are 1 and 63, 3 and 21, and 7 and 9. For example, 7 multiplied by 9 equals 63.
255
1 x 63, 3 x 21, 7 x 9
1 x 63, 3 x 21, 7 x 9
1 x 63, 3 x 21, 7 x 9
7x9=63
189
1, 3, 7, 9, 21 and 63: 1 x 63, 3 x 21, 7 x 9