There is a problem: evaluate 1 / 3 (- 3x ^ 2 = 6x-12) - 1 / 2 (4x-2x ^ 2), where x = 2010, But his calculation is also correct. What do you think is the matter?

There is a problem: evaluate 1 / 3 (- 3x ^ 2 = 6x-12) - 1 / 2 (4x-2x ^ 2), where x = 2010, But his calculation is also correct. What do you think is the matter?

1/3(-3x^2+6x-12)-1/2(4x-2x^2)
=-x^2+2x-4-2x+x^2
=-4
So no matter what the value of X is, the original formula is equal to - 4