(X+Y+1)²-(X-Y+1)²因式分解

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(X+Y+1)²-(X-Y+1)²因式分解(X+Y+1)²-(X-Y+1)²因式分解(X+Y+1)²-(X-Y+1)²因式分解全部展开收起2

(X+Y+1)²-(X-Y+1)²因式分解
(X+Y+1)²-(X-Y+1)²因式分解

(X+Y+1)²-(X-Y+1)²因式分解

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2(y+1)²