化简 (2a²-5a)-2(3a-5+a²),a=1...

来源：学生作业帮助网编辑：作业帮时间：2024/04/28 17:11:11

化简 (2a²-5a)-2(3a-5+a²),a=1...
化简 (2a²-5a)-2(3a-5+a²),a=1
...

化简 (2a²-5a)-2(3a-5+a²),a=1...
(2a²-5a)-2(3a-5+a²)
=2a²-5a-6a+10-2a²
=-11a+10
=-11*1+10
=-1

解
(2a²-5a)-2(3a-5+a²)
=(2a²-2a²)+(-5a-6a)+10
=-11a+10
=-11×1+10
=-1