Chọn câu sai? 2xy-x^2/2y^2 -xy=x/y

A. $\frac{2xy-x^2}{2y^2-xy}=\frac{x}{y}$

B. $\frac{\left(x-2\right)\left(x+4\right)}{x^2+7x+12}=\frac{x-2}{x+3}$

C. $\frac{\left(2x-4\right)\left(x-3\right)}{\left(x^3-27\right)\left(x-2\right)}=\frac{2}{x^2-3x+9}$

D. $\frac{25x{y}^2}{40x^3{y}^2}=\frac{5}{8x^2}$