Задание 4642

$$(x-3)(x-4)(x-5)-(x-2)(x-4)(x-5)=0$$; $$(x-4)(x-5)(x-3-x+2)=0$$; $$(x-4)(x-5)=0$$; $$\left\{\begin{matrix}x-4=0\\x-5=0\end{matrix}\right.$$ $$\Leftrightarrow$$ $$\left\{\begin{matrix}x=4\\x=5\end{matrix}\right.$$