(x-3)(x+3)(x四次+9x²+81)-2*根号2-1=
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![(x-3)(x+3)(x四次+9x²+81)-2*根号2-1=](/uploads/image/z/95510-38-0.jpg?t=%EF%BC%88x-3%EF%BC%89%EF%BC%88x%2B3%29%EF%BC%88x%E5%9B%9B%E6%AC%A1%2B9x%26%23178%3B%2B81%EF%BC%89-2%2A%E6%A0%B9%E5%8F%B72-1%3D)
(x-3)(x+3)(x四次+9x²+81)-2*根号2-1=
(x-3)(x+3)(x四次+9x²+81)
-2*根号2-1=
(x-3)(x+3)(x四次+9x²+81)-2*根号2-1=
x-3)(x+3)(x^4+9x²+81)
=(x^2-9)(x^4+9x²+81)
=(x²-9)(x²-9)²
=(x²-9)^3
=x^6-729
-2*根号2-1=1-2√2+(√2)²-(√2)²-1-1=(√2-1)²-3=(√2-1+√3)(√2-1-√3)
(x-3)(x+3)(x四次+9x²+81)
=(x^2-9)(x四次+9x²+81)
=x^6-729