若3a²-a-2=0,则5+2a-6a²=

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/03 02:09:49

若3a²-a-2=0,则5+2a-6a²=
若3a²-a-2=0,则5+2a-6a²=

若3a²-a-2=0,则5+2a-6a²=
3a²-a-2=0
3a²-a=2
5+2a-6a²
=5-2(3a²-a)
=5-2*2
=1

5+2a-6a²
= -2(3a²-a-2)+1
=0+1
=1