номер 122 гдз 8 класс алгебра Муравин Муравин

1)\begin{equation}\frac{x}{3+2} \end{equation}
x = 0
2)\begin{equation}\frac{6}{x} \end{equation}
ОДЗ: \begin{equation}x\neq 0 \end{equation} при x = 0 знаменатель обращается в 0.
3)\begin{equation}\frac{x-7}{2x} \end{equation}
x = 0
4)\begin{equation}\frac{-7x}{x+1} \end{equation}
x = -1
5)\begin{equation}\frac{4x-8}{x+6} \end{equation}
x = -6
6)\begin{equation}\frac{6x+3}{x-5} \end{equation}
x = 5
7)\begin{equation}\frac{x^{2}-9}{x+5} \end{equation}
x = -5
8)\begin{equation}\frac{100-x^{2}}{x-8} \end{equation}
x = 8
9)\begin{equation}\frac{x^{2}-5x}{\left ( x-5 \right )^{2}} \end{equation}
x = 5
10)\begin{equation}\frac{\left ( x+4 \right )^{2}}{x^{2}+4x} \end{equation}
x² + 4x = 0
x(x + 4) = 0
x = 0 или x + 4 = 0
x = -4
11)\begin{equation}\frac{4x^{2}-49}{4x^{2}-14x} \end{equation}
4x² - 14x = 0
x(4x - 14) = 0
x = 0
4x - 14 = 0
4x = 14 \begin{equation}x=\frac{14}{4}=3,5 \end{equation}
x = 0 или x = 3,5
12)\begin{equation}\frac{25x^{2}-16}{5x^{2}+4x} \end{equation}
5x² + 4x = 0
x(5x + 4) = 0
x = 0
5x + 4 = 0
5x = -4 \begin{equation}x=-\frac{4}{5}=-0,8 \end{equation}
x = 0 или x = -0,8
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