Всё по сумме/разности кубов
(a+2)(a^2-2a+4)=a^3-2a^2+4a+2a^2-4a+8=a^3+2^3;
(1-x^2)(1+x^2+x^4)=1-x^6;
(k-5)(k^2+5k+25)=k^3-5^3;
(3+m)(9-3m+m^2)=3^3+m^3;
(1+a^3)(1-a^3+a^6)=1+a^9;
(4-n^2)(16+4n^2+n^4)=4^3-n^6;
(25-5y^2+y^4)(5+y^2)=5^3+y^3;
(64+8z^3+z^6)(8-z^3)=8^3-z^9;
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Answers & Comments
Всё по сумме/разности кубов
(a+2)(a^2-2a+4)=a^3-2a^2+4a+2a^2-4a+8=a^3+2^3;
(1-x^2)(1+x^2+x^4)=1-x^6;
(k-5)(k^2+5k+25)=k^3-5^3;
(3+m)(9-3m+m^2)=3^3+m^3;
(1+a^3)(1-a^3+a^6)=1+a^9;
(4-n^2)(16+4n^2+n^4)=4^3-n^6;
(25-5y^2+y^4)(5+y^2)=5^3+y^3;
(64+8z^3+z^6)(8-z^3)=8^3-z^9;