\(\,x - \frac{1}{2}{x^2}\)

Câu hỏi: \(\,x - \frac{1}{2}{x^2}\)

A \(x = 0;\,x = -2\)

B \(x = 0;\,x = -3\)

C \(x = 0;\,x = 2\)

D \(x = 0;\,x = 3\)