The next significant question was how to predict the number of positive, negative and complex roots.
次一个重要的问题是怎样预知正根，负根和复根的个数。
The consideration of damping force leads to a fact that there exist complex roots to the characteristic equation for the structures.
考虑阻尼力后，结构的特征方程应有复数根，因而通常用于求解多项式方程实数根的二分法不再适用。
The consideration of damping force leads to a fact that there exist complex roots to the characteristic equation for the structures.
考虑阻尼力后，结构的特征方程应有复数根，因而通常用于求解多项式方程实数根的二分法不再适用。
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