作业帮x^4-2y^4-2x^3y-xy^3 因式分解- -.
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x^4-2y^4-2x^3y-xy^3 因式分解- -.
x^4-2y^4-2x^3y-xy^3 因式分解- -.
x^4-2y^4-2x^3y-xy^3 因式分解- -.
x^4-2y^4-2x^3y-xy^3=x^4-y^4-y^4-x^3y-x^3y-xy^3=（x^2-y^2）（x^2+y^2）-（x^3+y^3）y-xy（x^2+y^2）=（x^2-y^2）（x^2+y^2）-（y+x）（x^2+y^2-xy）y-xy（x^2+y^2）=（x^2+y^2）（x^2-y^2-xy）-y（y+x）（x^2+y^2-xy）=（x^2+y^2）（x^2-xy）-y^2（x^2+y^2）-y（y+x）（x^2-xy）-y^3（x+y）=（x^2-xy）【x^2+y^2-y（y+x）】-y^2（x^2+y^2-xy-y^2）=（x^2-xy）（x^2-xy）-y^2（x^2-xy）=（x^2-xy-y^2）（x^2-xy）
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