Chọn kết quả sai: x^2 - 10x + 25 = (x-5)^2; x^2 - 10x

x2 – 10x + 25 = x – 52

x2 – 10x + 25 = 5 – x2

x2 – 10x + 25 = – 5 – x2

x2 + 10x + 25 = 5 + x2