Изменения

<tex> \sum\limits_{i = 0}^k a_{n-i} \cdot q_{i} = a_n \cdot q_0 + a_{n-1} \cdot q_1 + \ldots + a_{n-k} \cdot q_k = a_n + a_{n-1} \cdot q_1 + \ldots + a_{n-k} \cdot q_k = 0</tex>.