怎么解(a-1)^2=a²-2a+1

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怎么解(a-1)^2=a²-2a+1怎么解(a-1)^2=a²-2a+1怎么解(a-1)^2=a²-2a+1怎么解(a-1)^2=a²-2a+1即原式=(a-1

怎么解(a-1)^2=a²-2a+1
怎么解(a-1)^2=a²-2a+1

怎么解(a-1)^2=a²-2a+1
怎么解(a-1)^2=a²-2a+1
即
原式=(a-1)×(a-1)
=a (a-1)-(a-1)
=a^2-a-a+1
=a^2-2a+1