求你们了TAT.因式分解:1.(x-y)^2-(x-y)=_____2.(a-b)(a+b)+(b-a)(a+b)^2=____3.xy+x+y+1=____4.a^2-1+b^2-2ab=______

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求你们了TAT.因式分解:1.(x-y)^2-(x-y)=_____2.(a-b)(a+b)+(b-a)(a+b)^2=____3.xy+x+y+1=____4.a^2-1+b^2-2ab=______

求你们了TAT.因式分解:1.(x-y)^2-(x-y)=_____2.(a-b)(a+b)+(b-a)(a+b)^2=____3.xy+x+y+1=____4.a^2-1+b^2-2ab=______
求你们了TAT.
因式分解:1.(x-y)^2-(x-y)=_____
2.(a-b)(a+b)+(b-a)(a+b)^2=____
3.xy+x+y+1=____
4.a^2-1+b^2-2ab=______

求你们了TAT.因式分解:1.(x-y)^2-(x-y)=_____2.(a-b)(a+b)+(b-a)(a+b)^2=____3.xy+x+y+1=____4.a^2-1+b^2-2ab=______
1.原式=(x-y-1)(x-y)
2.原式=(a-b)(a+b)-(a-b)(a+b)(a+b)=(a-b)(a+b)(1-a-b)
3.原式=x(y+1)+y+1=(x+1)(y+1)
4.原式=(a-b)^2-1=(a-b-1)(a-b+1)

这你不会吗?提取公因式即可。 (x-y)(x-y-1) (a-b)(a+b)(1-a-b) (x+1)(y+1) (a-b+1)(a-b-1)

1.(x-y)^2-(x-y)=_(x-y)(x-y-1)____
2.(a-b)(a+b)+(b-a)(a+b)^2=_(a+b)(a-b)(1-a-b)___
3.xy+x+y+1=_x(y+1)+(y+1)=(y+1)(x+1)___
4.a^2-1+b^2-2ab=_(a-b)^2-1=(a-b+1)(a-b-1)_____

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

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