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> 解方程组:。-九年级数学
解方程组:。-九年级数学
题目简介
解方程组:。-九年级数学
题目详情
解方程组:
。
题型:计算题
难度:中档
来源:上海中考真题
答案
解:
②①+②得x2+x-2=0,
解得x1=-2,x2=1,
由x1=-2,得y1=-5,
由x2=1,得y2=-2,
∴原方程组的解是
。
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题目简介
解方程组:。-九年级数学
题目详情
答案
②①+②得x2+x-2=0,
解得x1=-2,x2=1,
由x1=-2,得y1=-5,
由x2=1,得y2=-2,
∴原方程组的解是