因式分解:(x+y)^3+2xy(1-x-y)-1
2个回答
先把(x+y)^3-1 分解.得(x+y-1)((x+y)^2+(x+y)+1)
再与2xy(1-x-y)提公因式(x+y-1)
这样明白了吧.
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