If AB is a real number and B = 2010, the square of change sign A-1 + the square of change sign 1-A + 2010, find the value of a-b

If AB is a real number and B = 2010, the square of change sign A-1 + the square of change sign 1-A + 2010, find the value of a-b

Under the root sign, then a & # 178; - 1 > = 0, a & # 178; > = 0
1-a²>=0,a²