{tabular}{|l|l|} \hline \multirow{1}{*}{Câu 7 $\newline$ 0.45đ}&\( 7x^{3}+12x^{2}+6x+1 \) $\newline$ \( =(8x^{3}+12x^{2}+6x+1)-x^{3} \) $\newline$ \( =[(2x)^{3}+3(2x)^{2}.1+3.2x.1^{2}+1^{3})-x^{3} \) $\newline$ \( =(2x+1...