Chọn câu sai? (2xy - x^2)/(2y^2 - xy) = x/y

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

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

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

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