分解因式-xy(1-xy)-x^3y^3错了错了,是1-xy(1-xy)-x^3y^3

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分解因式-xy(1-xy)-x^3y^3错了错了,是1-xy(1-xy)-x^3y^3
分解因式-xy(1-xy)-x^3y^3
错了错了,是1-xy(1-xy)-x^3y^3

分解因式-xy(1-xy)-x^3y^3错了错了,是1-xy(1-xy)-x^3y^3
-xy(1-xy)-x^3y^3
=-xy(1-xy+x^2+y^2)
修改:
1-xy(1-xy)-x^3y^3
=1-xy+x^2y^2-x^3y^3
=1-xy+x^2y^2(1-xy)
=(1-xy)(x^2+y^2+1)

-xy(1-xy)-x^3y^3
=-xy[1-xy+x^2y^2)


-xy(1-xy)-x^3y^3 =-xy(1-xy+x^2y^2)

原式=1-xy(1-xy)-x^3y^3
=1-xy+x^2y^2-x^3y^3
=(1-xy)+(x^2y^2-x^3y^3)
=(1-xy)+x^2y^2(1-xy)
=(1-xy)(x^2y^2+1)