\[\boxed{\text{164\ (164).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
Пояснение.
Решение.
\[\boxed{\text{164.}\text{\ }\text{ОК\ ГДЗ\ -\ домашка\ на\ 5}}\]
\[\frac{(1 - 3a)^{2}}{3a^{2} + 5a - 2}\]
\[3a^{2} + 5a - 2 = 0\]
\[D = 5^{2} + 4 \cdot 3 \cdot 2 = 25 + 24 =\]
\[= 49\]
\[a_{1,2} = \frac{- 5 \pm 7}{6},\]
\[\text{\ \ }a_{1,2} = - 2;\frac{1}{3}.\]
\[\Longrightarrow 3a^{2} + 5a - 2 =\]
\[= 3 \cdot (a + 2)\left( a - \frac{1}{3} \right) =\]
\[= (a + 2)(3a - 1);\]
\[\Longrightarrow \frac{(1 - 3a)^{2}}{(a + 2)(3a - 1)} =\]
\[= - \frac{1 - 3a}{a + 2} = \frac{3a - 1}{a + 2}.\]