>>12897118>2 + 2 = 4 - 9/2 + 9/2>2+ 2 = sqrt[(4 - 9/2)^2] + 9/2This is false. The correct step would be:
>2+ 2 = - sqrt[(4 - 9/2)^2] + 9/2You need a minus sign in front of the square root because 9/2 = 4.5, therefore (4 - 9/2) is a negative number, so it can't be equal to the positive square root of its own square.
