Once upon, slover the root equation of a degree and equation of two degree that need inputcoefficient of equation, data separate need comma or space, output the root equation.
从前求一元一次方程和一元二次方程的根，要求输入方程的系数，数据间逗号或空格分隔，输出方程的根。
2
An augmenting system is designed to extend dimension of input, state, output and the coefficient matrixes in the method of augmenting vectors in order to predigest complicated problem.
增广向量法通过扩充输入、状态、输出等向量的维数及系统系数矩阵维数构造增广系统，使复杂问题简单化。
3
Firstly, the paper introduced theory base of the study, explained what is Expo and Expo economy, expatiated on multiplicator effect and coefficient of input-output unit.