(1)已知 x^2-x-1=0 求x^5-x^4-3x^2+x的值(2)若a^3-b^3=3a^2b-3ab^2+1,其中a,b为实数,则a-b=______.(3)已知m=x-y,n=xy试用m、n表示(x^3+y^3)^2(4)若x-y-z=3,yz-xy-xz=3,则x^2+y^2+z^2=(5)若关于x的二次三项式ax^2
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![(1)已知 x^2-x-1=0 求x^5-x^4-3x^2+x的值(2)若a^3-b^3=3a^2b-3ab^2+1,其中a,b为实数,则a-b=______.(3)已知m=x-y,n=xy试用m、n表示(x^3+y^3)^2(4)若x-y-z=3,yz-xy-xz=3,则x^2+y^2+z^2=(5)若关于x的二次三项式ax^2](/uploads/image/z/2708799-15-9.jpg?t=%EF%BC%881%EF%BC%89%E5%B7%B2%E7%9F%A5+x%5E2-x-1%3D0+%E6%B1%82x%5E5-x%5E4-3x%5E2%2Bx%E7%9A%84%E5%80%BC%EF%BC%882%EF%BC%89%E8%8B%A5a%5E3-b%5E3%3D3a%5E2b-3ab%5E2%2B1%2C%E5%85%B6%E4%B8%ADa%2Cb%E4%B8%BA%E5%AE%9E%E6%95%B0%2C%E5%88%99a-b%3D______.%EF%BC%883%EF%BC%89%E5%B7%B2%E7%9F%A5m%3Dx-y%2Cn%3Dxy%E8%AF%95%E7%94%A8m%E3%80%81n%E8%A1%A8%E7%A4%BA%EF%BC%88x%5E3%2By%5E3%EF%BC%89%5E2%EF%BC%884%EF%BC%89%E8%8B%A5x-y-z%3D3%2Cyz-xy-xz%3D3%2C%E5%88%99x%5E2%2By%5E2%2Bz%5E2%3D%EF%BC%885%EF%BC%89%E8%8B%A5%E5%85%B3%E4%BA%8Ex%E7%9A%84%E4%BA%8C%E6%AC%A1%E4%B8%89%E9%A1%B9%E5%BC%8Fax%5E2)
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