若3a²-a-2=0,则5+2a-6a²=

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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

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