(2013•黄埔区一模)若a2-2a+1=0,则2a2-4a+3=______.
1个回答
由a
2
-2a+1=0得,a
2
-2a=-1,
所以,2a
2
-4a+3=2(a
2
-2a)+3=2×(-1)+3=1.
故答案为:1.
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