(x的四次方+y的四次方-2x²y²)(x的四次方+y的四次方+2x²y²)快点!

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(x的四次方+y的四次方-2x²y²)(x的四次方+y的四次方+2x²y²)快点!

(x的四次方+y的四次方-2x²y²)(x的四次方+y的四次方+2x²y²)快点!
(x的四次方+y的四次方-2x²y²)(x的四次方+y的四次方+2x²y²)
快点!

(x的四次方+y的四次方-2x²y²)(x的四次方+y的四次方+2x²y²)快点!
(x的四次方+y的四次方-2x²y²)(x的四次方+y的四次方+2x²y²)
=(x²-y²)²(x²+y²)²
=[(x²-y²)(x²+y²)]²
=(x⁴-y⁴)²
=x^8-2x^4y^4+y^8

(x^4+y^4-2x^2y^2)(x^4+y^4+2x^2y^2)=(x^2-y^2)^2(x^2+y^2)^2=(x^4-y^4)^2=x^8-2x^4y^4+y^8

(x⁴+y⁴-2x²y²)(x⁴+y⁴+2x²y²)
=(x²-y²)²(x²+y²)²
=[(x²-y²)(x²+y²)]²
=(x⁴-y⁴)²
=x⁸-2x⁴y⁴+y⁸