化简：3x2－5x一6－7x2－6x＋15

问题详情：

化简：3x2－5x一6－7x2－6x＋15

【回答】

3x2－5x–6－7x2－6x +15

       =（3－7）x2+（－5－6）x +（－6+15）·············································· 1分

= －4x2－11 x +9················································································· 2分 

知识点：整式的加减

题型：计算题