\((x-9)({x}^{7}+{x}^{6}+{x}^{5}+{x}^{4}+{x}^{3}+{x}^{2}+x+1)\)
\({x}^{8}+{x}^{7}+{x}^{6}+{x}^{5}+{x}^{4}+{x}^{3}+{x}^{2}+1x-9{x}^{7}-9{x}^{6}-9{x}^{5}-9{x}^{4}-9{x}^{3}-9{x}^{2}-9x-9\)
\({x}^{8}-8{x}^{7}-8{x}^{6}-8{x}^{5}-8{x}^{4}-8{x}^{3}-8{x}^{2}-8x-9\)
.