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多项式ac-bc+a2-b2分解因式的结果是
A.(a-b)(a+b+c)
B.(a-b)(a+b-c)
C.(a+b)(a+b-c)
D.(a+b)(a-b+c)
A.(x+y)(x-y)+(a+b)(a-b)+2(ax+by)
B.(x2+2ax+a2)-(y2-2by+b2)
C.(x+y+a-b)(x-y+a+b)
D.(x+y-a-b)(x+y+a+b)
多项式a2-ab+bc-c2分解因式的结果是
A.(a-c)(a+c+b)
B.(a-c)(a-c-b)
C.(a-c)(a+c-b)
D.(a+c)(a+c-b)
A.(x+y)(x-y)+(a+b)(a-b)+2(ax+by)
B.(x2+2ax+a2)-(y2-2by+b2)
C.(x+y+a-b)(x-y+a+b)
D.(x+y-a-b)(x+y+a+b)