There is something wrong with the estimation question. It should be x = root 3+ 1, or 2x 2+4x+2007.

Steps: the original formula = 2 (X- 1) 2+2005 = 2 (radical number 3-2) 2+2005 = 14-8 radical number 3+2005=

Students who are not "formal" and teaching assistants will make mistakes.