\[x^{2} - 5|x - 5| - 10x \leq - 25\]
\[x^{2} - 10x + 25 \leq 5|x - 5|\]
\[(x - 5)^{2} \leq 5|x - 5|\]
\[y = |x - 5|:\]
\[y^{2} \leq 5y\]
\[y^{2} - 5y \leq 0\]
\[y(y - 5) \leq 0\]
\[0 \leq y \leq 5\]
\[0 \leq |x - 5| - верно\ при\ всех\ \text{x.}\]
\[|x - 5| \leq 5\]
\[- 5 \leq x - 5 \leq 5\]
\[0 \leq x \leq 10\]
\[Ответ:x \in \lbrack 0;10\rbrack.\]