a2-b2-2a+1因式分解

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a2-b2-2a+1因式分解

a2-b2-2a+1因式分解
a2-b2-2a+1
因式分解

a2-b2-2a+1因式分解
a2-b2-2a+1
=(a-1)^2-b^2
=[(a-1)+b][(a-1)-b]
=(a+b-1)(a-b-1)

原式=(a-1)²-b²=(a-1+b)(a-1-b)

a2-b2-2a+1
=a2-2a+1-b2
=(a-1)2-b2
=(a-1+b)(a-1-b)

a^2-b^2-2a+1=(a^2-2a+1)-b^2=(a-1)^2-b^2=(a-1+b)(a-1-b)