Chọn câu sai? x^3 -1/x^2 -2x+1=x^2 +x+1/x-1

A. $\frac{x^3-1}{x^2-2x+1}=\frac{x^2+x+1}{x-1}$

B. $\frac{5\left(x-y\right)-3\left(x-y\right)}{10\left(x-y\right)}=\frac{4}{5}$

C. $\frac{x^2+4x+3}{2x+6}=\frac{x+1}{2}$

D. $\frac{16x^{2}y{\left(x+y\right)}^2}{12xy\left(x+y\right)}=\frac{4\left(x+y\right)}{3}$