(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=

(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