(x²+x+6)(x²-x+6)=(-5x+2y)²=（-3m-4n）²=（x+1）²-2x+1=

(x²+x+6)(x²-x+6)=(-5x+2y)²=（-3m-4n）²=（x+1）²-2x+1=
(x²+x+6)(x²-x+6)=
(-5x+2y)²=
（-3m-4n）²=
（x+1）²-2x+1=

(x²+x+6)(x²-x+6)=(-5x+2y)²=（-3m-4n）²=（x+1）²-2x+1=
(x²+x+6)(x²-x+6)
=(x²+6+x)(x²+6-x)
=(x²+6)²-x²
=x^4+12x²+36-x²
=x^4+11x²+36
(-5x+2y)²
=25x²-20xy+4y²
（-3m-4n）²
=9m²+24mn+16n²
（x+1）²-2x+1
=x²+2x+1-2x+1
=x²+2

(x²+x+6)(x²-x+6)
=[(x²+6)+x]*[x²+6)-x]
=(x²+6)²-x²
=x^4+12x²+36-x²
=x^4+11x²+36

(-5x+2y)²=25x²-20xy+4y²
...

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(x²+x+6)(x²-x+6)
=[(x²+6)+x]*[x²+6)-x]
=(x²+6)²-x²
=x^4+12x²+36-x²
=x^4+11x²+36

(-5x+2y)²=25x²-20xy+4y²

（-3m-4n）²=[-(3m+4n)]²=9m²+24mn+16n²

（x+1）²-2x+1
=x²+2x+1-2x+1
=x²+2

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