The method of undetermined coefficients is the general method of solving a linear differential equation with constant coefficients of the second order. 二阶常系数线性微分方程可用常规方法待定系数法求解。
Approach to the Problem in Working out the Particular Solution to the Nonhomogeneous Linear Differential Equation with Constant Coefficients by the Method of Undetermined Coefficients 待定系数法求常系数线性齐次方程特解问题的探讨