问题
填空题
关于x的方程x2+3x-m=0的两根为x1和x2，则x1+x2=______．
答案
∵方程x2+3x-m=0的两根为x1和x2，
∴x1+x2=-3．
故答案为-3．
搜题请搜索小程序“爱下问搜题”
关于x的方程x2+3x-m=0的两根为x1和x2，则x1+x2=______．
∵方程x2+3x-m=0的两根为x1和x2，
∴x1+x2=-3．
故答案为-3．
| 补全对话（有两项多余选项）。 | |
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