\[\boxed{\text{853\ (853).\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[1)\ y(5) = 0,3 \cdot 5 - 2 =\]
\[= 1,5 - 2 = - 0,5\]
\[y( - 2) = 0,3 \cdot ( - 2) - 2 =\]
\[= - 0,6 - 2 = - 2,6\]
\[y(0) = 0 - 2 = - 2\]
\[2)\ при\ y = 1:\ \ \]
\[0,3x - 2 = 1\ \ \]
\[0,3x = 3\ \]
\[x = 10.\]
\[при\ y = - 11:\ \]
\[0,3x - 2 = - 11\]
\[0,3x = - 9\ \]
\[x = - 30.\]
\[при\ y = 0,8:\ \]
\[0,3x - 2 = 0,8\]
\[0,3x = 2,8\ \ \]
\[x = \frac{28}{3} = 9\frac{1}{3}.\]
\[\boxed{\text{853.\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[1)\ 3x³ + 3y³ = 3 \cdot \left( x^{3} + y^{3} \right) =\]
\[= 3 \cdot (x + y)(x^{2} - xy + y^{2})\]
\[2)\ 5m^{4} - 320mn^{3} =\]
\[= 5m\left( m^{3} - 64n^{3} \right) =\]
\[= 5m(m - 4n)(m^{2} + 4mn + 16n^{2})\]
\[3)\ 6c^{5} - 6c^{8} = 6c^{5}\left( 1 - c^{3} \right) =\]
\[= 6c^{5}(1 - c)\left( 1 + c + c^{2} \right)\]