一、知识要点1．方程组的概念：方程组、方程组的解、解方程组、二元一次方程组、二元二次方程组．2．方程组的解法：（1）二元一次方程组的解法：加减消元法和代人悄无法．三元一次方程组的解法与二元一次方程组的解法相类似．（2）二元二次方程组的解法形式的：可消去二次项 First, knowledge points 1. The concept of equations: equations, solutions of equations, solution equations, binary equations, binary quadratic equations. 2. The solution of the equations: (1) The solution of the binary equations: the addition and subtraction elimination method and the generation cannot silently. The solution of the ternary equations is similar to that of the binary equations. (2) Solution of binary quadratic equations: Can eliminate the quadratic term