请问这题怎么做，求过程。thank you very much。

来源：学生作业帮编辑：作业帮分类：综合作业时间：2024/08/31 22:48:57

设另一个因式为x+a
则由多项式乘法可知2a=-8，∴a=-4
∴(x+2)(x-4)=x²-2x-8
∴p=2

请问这题怎么做，求过程。thank you very much。做第五道,Thank you.very much thank you very much 怎么回答 thank you very much怎么读? 怎么写,thank you very much. Thank you very much 英语求翻译求解答Thank you very much Thank you very much! Thank you very much, you,much,thank,very Thank you very much. Thank you very much