因式分解:x(y-1)+y(1-y)=?

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因式分解:x(y-1)+y(1-y)=?因式分解:x(y-1)+y(1-y)=?因式分解:x(y-1)+y(1-y)=?原式=xy-x+y-y²=xy-y²-(x-y)=y(x-y

因式分解:x(y-1)+y(1-y)=?
因式分解:x(y-1)+y(1-y)=?

因式分解:x(y-1)+y(1-y)=?
原式=xy-x+y-y²
=xy-y²-(x-y)
=y(x-y)-(x-y)
=(x-y)(y-1)