-(-x y)²(x²-xy-y²) (x²y)²解开上面的题

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-(-xy)²(x²-xy-y²)(x²y)²解开上面的题-(-xy)²(x²-xy-y²)(x²y)

-(-x y)²(x²-xy-y²) (x²y)²解开上面的题
-(-x y)²(x²-xy-y²) (x²y)²
解开上面的题

-(-x y)²(x²-xy-y²) (x²y)²解开上面的题
-x^4y+x^3y^3+x^6y^6

-(-x y)²(x²-xy-y²) (x²y)²
=-（x^2y^2)(x^4y^2)(x^2-xy-y^2)
=-(x^6y^4)(x^2-xy-y^2)
=-(x^8y^4-x^7y^5-x^6y^6)
=-x^8y^4+x^7y^5+x^6y^6