Ответ:
Объяснение:
Докажите тождество 6b(6+b)+bc(b-c)-6c(6+c)=(6+b)(6+c)(b-c)
6b(6+b)+bc(b-c)-6c(6+c)=
=6b(6+b)+c(b²-bc)-c(6²+6c)=
=6b(6+b)+c(b²-bc-6²-6c)=
=6b(6+b)+c((b-6)(b+6)-c(b+6))=
=6b(6+b)+c(b+6)(b-6-c)=
=6b(6+b)+(b+6)(bc-6c-c²)=
=(6+b)(6b+bc-6c-c²)=
=(6+b)((6(b-c)+c(b-c))=
=(6+b)(6+c)(b-c)
доказано
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Answers & Comments
Ответ:
Объяснение:
Докажите тождество 6b(6+b)+bc(b-c)-6c(6+c)=(6+b)(6+c)(b-c)
6b(6+b)+bc(b-c)-6c(6+c)=
=6b(6+b)+c(b²-bc)-c(6²+6c)=
=6b(6+b)+c(b²-bc-6²-6c)=
=6b(6+b)+c((b-6)(b+6)-c(b+6))=
=6b(6+b)+c(b+6)(b-6-c)=
=6b(6+b)+(b+6)(bc-6c-c²)=
=(6+b)(6b+bc-6c-c²)=
=(6+b)((6(b-c)+c(b-c))=
=(6+b)(6+c)(b-c)
доказано