2a+1+(a²-2)+(a²-2a+1) 怎么化简?

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2a+1+(a²-2)+(a²-2a+1)怎么化简?2a+1+(a²-2)+(a²-2a+1)怎么化简?2a+1+(a²-2)+(a²-2a

2a+1+(a²-2)+(a²-2a+1) 怎么化简?
2a+1+(a²-2)+(a²-2a+1) 怎么化简?

2a+1+(a²-2)+(a²-2a+1) 怎么化简?
原式=2a+1+a²-2+a²-2a+1
=2a²

2a+1+(a²-2)+(a²-2a+1)
=2a+1+a²-2+a²-2a+1
=2a²

原式=a^2+2+a^2-2=2a^2