\(\left(Ax+B\right)\left(Cx+D\right)=A.C.x^2+\left(B.C+A.D\right)x+AD=50x^2+25x-3\)
\(\hept{\begin{cases}A.C=50\\B.C+A.D=25\\A.D=-3\end{cases}}\)do D=-1 ta tính được\(\hept{\begin{cases}A=3\\B=\frac{42}{25}\\C=\frac{50}{3}\end{cases}}\)
\(\left(\frac{C}{A}-B\right)D^{2017}=-\frac{827}{225}\)