因式分解:(a-2b)×(a-2b-4)+4-c^2=

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因式分解:(a-2b)×(a-2b-4)+4-c^2=因式分解:(a-2b)×(a-2b-4)+4-c^2=因式分解:(a-2b)×(a-2b-4)+4-c^2=原式=(a-2b)^2-4(a-2b)

因式分解:(a-2b)×(a-2b-4)+4-c^2=
因式分解:(a-2b)×(a-2b-4)+4-c^2=

因式分解:(a-2b)×(a-2b-4)+4-c^2=
原式=(a-2b)^2-4(a-2b)+4-c^2
=(a-2b+2)^2-c^2
=(a-2b-c+2)(a-2b+c+2)

=-c^2