Square root of x times square root of x is x. Square root of x times negative 1 is negative square root of x. Negative 1 times square root of x is another negative square root of x. The negative 1 times negative 1 is equal to positive 1. This part right over here will simplify to x minus 2 square roots of x. This is minus 2 square roots of x. Minus 2 square roots of x, and then you have plus 1.