Решебник по алгебре 7 класс Мерзляк Задание 274

\[\boxed{\text{274\ (274).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]

\[1)*\ \cdot 3b^{4} = 12b^{6}\]

\[*\ = 12b^{6}\ :3b^{4}\]

\[*\ = 4b^{2}.\]

\[2) - 5a^{5}b^{2} \cdot \ *\ = - 20\ a^{6}b^{8}\]

\[*\ = - 20a^{6}b^{8}\ :\left( - 5a^{5}b^{2} \right)\]

\[*\ = 4\ ab^{6}.\]

\[3) - 7a^{3}b^{9} \cdot \ *\ = 4,2a^{5}b^{12}\]

\[*\ = 4,2a^{5}b^{12}\ :\left( - 7a^{3}b^{9} \right)\]

\[*\ = \ - 0,6a^{2}b^{3}.\]

\[4)\ 23a^{12}b^{16} \cdot \ *\ = - 23a^{29}b^{17}\]

\[*\ = - 23a^{29}b^{17}\ :23a^{12}b^{16}\]

\[*\ = - a^{17}\text{b.}\]