Code: Select all

` 3x + 21`

-------------

3x+4) 9x^2 – 9x – 28

-9x^2 – 12x

-------------

- 21x – 28

- 63x + 84

-------------

84 – 112

This is at least the third time I have had this problem in the last page and a half. Can anyone see where I went wrong?