Найди корни уравнения (4,2x-6,3)(5x+5,5)=0.

\[(4,2x - 6,3)(5x + 5,5) = 0\]

\[1)\ 4,2x - 6,3 = 0\]

\[4,2x = 6,3\]

\[x = 6,3\ :4,2\]

\[x = 1,5\]

\[2)\ 5x + 5,5 = 0\]

\[5x = - 5,5\]

\[x = - 5,5\ :5\]

\[x = - 1,1\]

\[Ответ:x = - 1,1;\ \ 1,5.\]