ОГЭ по математике. №9 Квадратные уравнения. ФИПИ. Задача 7

ОТВЕТ: 0.

\(8{x^2} = 72x\,\,\,\,\,\, \Leftrightarrow \,\,\,\,\,\,8{x^2}-72x = 0\,\,\,\,\,\, \Leftrightarrow \,\,\,\,\,\,x\left( {8x-72} \right) = 0\,\,\,\,\,\, \Leftrightarrow \)

\( \Leftrightarrow \,\,\,\,\,\,\left[ \begin{array}{l}x = 0,\\8x-72 = 0\end{array} \right.\,\,\,\,\,\, \Leftrightarrow \,\,\,\,\,\,\left[ \begin{array}{l}x = 0,\\8x = 72\end{array} \right.\,\,\,\,\, \Leftrightarrow \,\,\,\,\,\,\left[ \begin{array}{l}x = 0,\\x = 9.\end{array} \right.\)

Меньший корень уравнения \(x = 0.\)

Ответ: 0.