(2a+4b)(3a-6b)(a平方+4b平方)=

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(2a+4b)(3a-6b)(a平方+4b平方)=(2a+4b)(3a-6b)(a平方+4b平方)=(2a+4b)(3a-6b)(a平方+4b平方)=(2a+4b)(3a-6b)(a²+4b

(2a+4b)(3a-6b)(a平方+4b平方)=
(2a+4b)(3a-6b)(a平方+4b平方)=

(2a+4b)(3a-6b)(a平方+4b平方)=
(2a+4b)(3a-6b)(a²+4b²)
=2(a+2b)*3(a-2b)(a²+4b²)
=6(a²-4b²)(a²+4b²)
=6(a⁴-16b⁴)
=6a⁴-96b⁴

=2(a+2b)*3(a-2b)*(a^2+4b^2)
=6(a^2-4b^2)*(a^2+4b^2)
=6(a^4-16b^4)