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teran5
@teran5
July 2022
1
15
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решите пожалуйста 686(б), 687(б,г).
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nikto44
2 сейчас отправлю через 5 минут
1 votes
Thanks 1
teran5
Спасибо
nikto44
(7y-4)(2y+3)-13y=14y^2+21y-8y-12-13y=14y^2+21y-21y-12=14y2-12
nikto44
5b^3+(a^2+5b)(ab-b^2)=5b^3+(a^3b-a^2b^2+5ab^2-5b^3)=5b^3+a^3b-a^2b^2+5ab^2-5b^3=а^3b-a^2b^2+5ab
nikto44
не за что
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