`(2x^2y)^3.(x-4xy^2+3x^2y)`
`=8x^6y^3(x-4xy^2+3x^2y)`
`=8x^7y^3-32x^7y^5+24x^8y^4`
Đáp án + Giải thích các bước giải:
`(2x^2 y)^3 . (x - 4xy^2 + 3x^2y)`
` = (8x^6 y^3) . (x - 4xy^2 + 3x^2y)`
` = 8x^6y^3 . x - 8x^6y^3 . 4xy^2 + 8x^6y^3 . 3x^2y`
` = 8x^7y^3 - 32x^7y^5 + 24x^8y^4`
3. Rewrite the following sentences in direct speech. 1. They wondered what to do to get good marks at the exam. ____________________________________________________________________2. Minh asked his teacher what to prepare for the camping. ____________________________________________________________________3. Nam and Lan couldn't decide what to buy for Linh on her birthday. ____________________________________________________________________4. She was not sure whether to tell her close friend that news. ____________________________________________________________________ 5. He had no idea who to ask for advice about his problem. ____________________________________________________________________ giúp em với ạ, em đang cần gấp :(
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