Thực hiện các phép nhân sau: (x^2 - x) . (2x^2 - x - 10);

Đặt tính nhân như sau:

\(\begin{array}{l}\begin{array}{*{20}{c}}{}&{2{x^2} - x - 10}\\ \times &{}\\{}&{\,\,\,\,\,\,\,\,\,\,\,\,\,{x^2} - x}\\\hline{}&{ - 2{x^3} + {x^2} + 10x}\\{}&{2{x^4} - {x^3} - 10{x^2}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}\hline\end{array}\\\,\,\,\,\,\,\,\,2{x^4} - 3{x^3} - 9{x^2} + 10x\end{array}\)