(x—1)(x—3)+1因式分解

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(x—1)(x—3)+1因式分解
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(x—1)(x—3)+1因式分解
(x—1)(x—3)+1因式分解

(x—1)(x—3)+1因式分解
(x—1)(x—3)+1
=x²-4x+3+1
=x²-4x+4
=﹙x-2﹚²

(x-1)(x-3)+1,先拆开来得x2-4x+4就得(x-2)的平方了

=(x-2)平方