x3-x2y-xy2+y3=1 因式分解?
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x^3-x^2.y-xy^2+y^3
=(x^3+y^3)-(x^2.y+xy^2)
=(x+y)(x^2-xy+y^2- xy(x+y)
=(x+y)(x^2+y^2)
=(x^3+y^3)-(x^2.y+xy^2)
=(x+y)(x^2-xy+y^2- xy(x+y)
=(x+y)(x^2+y^2)
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原式
=x2(x-y)-y2(x-y)逗贺
=(x2-y2)(x-y)
=(x+y)(裂扒x-y)肆指昌^2
=x2(x-y)-y2(x-y)逗贺
=(x2-y2)(x-y)
=(x+y)(裂扒x-y)肆指昌^2
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x³-x²y-xy²+y³=1
x²(x-y)橡散樱掘嫌-y²(x-y)=1
(x²-y²)(x-y)=1
(x+y)(x-y)(梁丛x-y)=1
(x+y)(x-y)²=1
x²(x-y)橡散樱掘嫌-y²(x-y)=1
(x²-y²)(x-y)=1
(x+y)(x-y)(梁丛x-y)=1
(x+y)(x-y)²=1
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