1. The problem statement, all variables and given/known data The problem is a 2+b 2+c 2=2(a-b-c)-3 Find a+b+c 2. Relevant equations none 3. The attempt at a solution well i tried to add 2(ab+ac+cb) to make the a 2+b 2+c 2=(a+b+c) 2 so the other side also has a 2(ab+ac+cb) :. it becomes( if brackets are opened) 2a-2b-2c+2ab+2ac+2cb-2-1 =2a+2ab+2ac-2b-2c-2+2cb-1 =2a(1+b+c)-2(1+b+c) +2cb-1 = (1+b+c)(2a-2)+2cb-1 Hey i even close to any proper solution Plz help me out!!