Đáp án:
`a(b^3-c^3)+b(c^3-a^3)+c(a^3-b^3)`
`= ab^3-ac^3+bc^3-a^3b+a^3c-b^3c`
`= (ab^3-a^3b)+(bc^3-ac^3)+c(a^2-b^3)`
`= ab(b-a)(b+a)+c^3(b-a)-c(b-a)(b^2+ab+a^2)`
`= (b-a)[ab(b+a)+c^3-c(b^2+ab+a^2)]`
`= (b-a)[ab^2+a^2b+c^3-b^2c-abc-c^3]`
`= (b-a)(ab^2+a^2b-b^2c-abc)`
`=ab^3-ac^3+bc^3-a^3b+a^3c-cb^3`
Gấp ạ,toàn trắc nghiệm nên dễ lắm
Giúp em bài này với ạ em cảm ơn
Helppppppppppppppppppppppppppppppppppp
Làm giúp mình với ạ Đúng + nhanh = 5* + CTLHN
1.Where is he She asked me 2.what are you doing? She asked me 3.why did you go out last night She asked me 4.Who was that beautiful woman She asked me 5.how is your mother She asked me
giúp e bài này với ạ , có `CTLHN` Đề bài : Rút gọn
Mua 52 bút bi hết 78 000 đồng. Hỏi nếu mỗi bút bi đó giảm giá 300 đồng thì với số tiền 78 000 đồng sẽ mua được bao nhiêu bút chì? GIẢI ĐƯỢC CHO 5 SAO
1. You must tell him, or i must tell him (Conjunction) = 2. I don't want to go alone and i don't have anyone to go with. (Relative clauses) = 3. His father is not as old as you think he is. (Comparision) = 4. That is as stupid a man as you thought he was. = Help me!!!
Mn lm giúp em bài này nhoa :3 có 8 câu thôi mừ -_- :< V. Supply the correct form of the words in brackets. 1. Community ______________ have a lot of positive effects on students. (serve) 2. ______________ people find it difficult to have a job. (disable) 3. I’d like to work as a volunteer for a charity ______________. (organise) 4. He made a £5000 ______________ to charity. (donate) 5. The Soup Kitchen is a ______________ organization that provides free meals for needy people. (profit) 6. The homeless shelters are entirely staffed by ______________ worker. (volunteer) 7. The organization is funded by ______________ donations. (charity) 8. We help the ______________ with housework and gardening. (old)
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