GRE Sample Test 3 Quantitative Reasoning 2

Since the equation ${\mathit{x}}^2$ = x is quadratic, set it equal to zero, and determine the possible values for x: ${\mathit{x}}^2$ − x = 0 → x (x − 1) = 0 → x = 0 or (x − 1) =0 → x= 0 or x = 1. The relationship cannot be determined.