Ответ:
Объяснение:
1) -5a^4 (3+2a)(2a-3)=
= -5a^4 (6a+4a^2-9+6a)=
= -30a^5-20a^6+45a^4-30a^5=
= -20a^6-60a^5+45a^4
2) (x^4-y^4)(x^8+y^8)(x^4+y^4)=
=(x^4-y^4)(x^12+x^4y^8+x^8y^4+y^12)=
=x^16-x^12y^4+x^8y^8-x^4y^12+x^12y^4-x^8y^8+x^4y^12-y^16=
=x^16-y^16
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Answers & Comments
Ответ:
Объяснение:
1) -5a^4 (3+2a)(2a-3)=
= -5a^4 (6a+4a^2-9+6a)=
= -30a^5-20a^6+45a^4-30a^5=
= -20a^6-60a^5+45a^4
2) (x^4-y^4)(x^8+y^8)(x^4+y^4)=
=(x^4-y^4)(x^12+x^4y^8+x^8y^4+y^12)=
=x^16-x^12y^4+x^8y^8-x^4y^12+x^12y^4-x^8y^8+x^4y^12-y^16=
=x^16-y^16