Решебник по алгебре 8 класс Мерзляк ФГОС Задание 92

 

\[\boxed{\text{92\ (92).\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]

\[1)\ 1 - 4 \cdot (x + 1) = 1,8 - 1,6x\]

\[1 - 4x - 4 = 1,8 - 1,6x\]

\[- 4x + 1,6x = 1,8 - 1 + 4\]

\[- 2,4x = 4,8\]

\[x = - \frac{4,8}{2,4}\]

\[x = - 2\]

\[Ответ:\ x = - 2.\]

\[2)\ 3 \cdot (0,5x - 4) + 8,5x =\]

\[= 10x - 11\]

\[1,5x - 12 + 8,5x = 10x - 11\]

\[1,5x + 8,5x - 10x = 12 - 11\]

\[10x - 10x = 1\]

\(0 \cdot x = 1\)

\[Ответ:корней\ нет.\]

\[\boxed{\text{92.\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]

\[1)\ a^{2}b \cdot \ *\ = a^{2}b^{2}\]

\[*\ = \frac{a^{2}b^{2}}{a^{2}b}\]

\[*\ = b.\]

\[2)\ 5xy^{3} \cdot \ *\ = 10x^{4}y^{6}\]

\[*\ = \frac{10x^{4}y^{6}}{5xy^{3}}\]

\[*\ = 2x^{3}y^{3}.\]

\[3)\ 6x^{5} \cdot \ *\ = 12x^{10}\]

\[*\ = \frac{12x^{10}}{6x^{5}}\]

\[*\ = 2x^{5}.\]