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номер 79 гдз 8 класс алгебра Муравин Муравина
1)\begin{equation}\frac{a+b+2c}{abc}
\end{equation}
\begin{equation}\frac{a}{abc}+\frac{b}{abc}+\frac{2c}{abc}=
\end{equation}
\begin{equation}=\frac{1}{bc}+\frac{1}{ac}+\frac{2}{ab}
\end{equation}
2)\begin{equation}\frac{3x+2y-6}{6xy}
\end{equation}
\begin{equation}
\frac{3x}{6xy}+\frac{2y}{6xy}-\frac{6}{6xy}=
\end{equation}
\begin{equation}=\frac{1}{2y}+\frac{1}{3x}-\frac{1}{xy}
\end{equation}
3)\begin{equation}\frac{d^{2}-4dc+3c^{2}}{6dc}
\end{equation}
\begin{equation}\frac{d^{2}}{6dc}-\frac{4dc}{6dc}+\frac{3c^{2}}{6dc}=
\end{equation}
\begin{equation}=\frac{d}{6c}-\frac{2}{3}+\frac{c}{2d}
\end{equation}
4)\begin{equation}\frac{n^{2}+15kn-10k^{2}}{5k^{2}n^{2}}
\end{equation}
\begin{equation}\frac{n^{2}}{5k^{2}n^{2}}+\frac{15kn}{5k^{2}n^{2}}-\frac{10k^{2}}{5k^{2}n^{2}}=
\end{equation}
\begin{equation}=\frac{1}{5k^{2}}+\frac{3}{kn}-\frac{2}{n^{2}}
\end{equation}
5)\begin{equation}\frac{\left ( x^{2}-y \right )^{2}}{x^{3}}
\end{equation}
\begin{equation}\frac{x^{4}-2x^{2}y+y^{2}}{x^{3}}=
\end{equation}
\begin{equation}=\frac{x^{4}}{x^{3}}-\frac{2x^{2}y}{x^{3}}+\frac{y^{2}}{x^{3}}=
\end{equation}
\begin{equation}=x-\frac{2y}{x}+\frac{y^{2}}{x^{3}}
\end{equation}
6)\begin{equation}\frac{\left ( a-b \right )^{3}}{b^{2}}=
\end{equation}
\begin{equation}=\frac{a^{3}-3a^{2}b+3ab^{2}-b^{3}}{b^{2}}=
\end{equation}
\begin{equation}=\frac{a^{3}}{b^{2}}-\frac{3a^{2}b}{b^{2}}+\frac{3ab^{2}}{b^{2}}-\frac{b^{3}}{b^{2}}=
\end{equation}
\begin{equation}=\frac{a^{3}}{b^{2}}-\frac{3a^{2}}{b}+3a-b
\end{equation}