`3/2 xx \sqrt{32} - 2/5 xx \sqrt{50} - 1/2 xx \sqrt{1/2}`
`= 3/2 xx 4\sqrt{2} - 2/5 xx 5\sqrt{2} - 1/2 xx \sqrt{2}/2`
`= 6\sqrt{2} - 2\sqrt{2} - \sqrt{2}/4`
`= 4\sqrt{2} - \sqrt{2}/4`
`= -4+4\sqrt{2}`
Đáp án:
` -4` `+` `4\sqrt{2}`
Giải thích các bước giải:
`3/2` `xx` `\sqrt{32}` `-` ` 2/5` `xx` `\sqrt{50}` `-` `1/2` `xx` `\sqrt{1/2}`$\\$ `= 3/2` `xx` `4\sqrt{2}` `-` `2/5` `xx` `5\sqrt{2}` `-` `1/2` `xx` `\sqrt{2}/2``= 6\sqrt{2}` `-` `2\sqrt{2}` `-` `\sqrt{2}/4`$\\$ `= 4\sqrt{2}` `-` `\sqrt{2}/4` `= -4` `+` `4\sqrt{2}`$\\$
chúc bạn học tốt T^T
1. Vietnam is a/an/ the multiethnic country with 54 ethnic groups. 2 The Viet (Kinh) people account for 87% of a / the / – country’s population. 3. Chaul Chnam Thmey is a/ an/ the celebration of New Year by Khmers. 4 Folk singing of the Bru-Van Kieu is popular, particularly cha chap and sim, the / a / an alternating chant between young men and women. 5 Ancestor worship is the / a / – most important religious activity among the Bru-Van Kieu. 6. The La Ha grow the/ – /a cotton but do not weave. 7. The Rong house of the Xo Dang is a / an / the big stilt house with a high roof which looks like a/an/ the axe. 8. The young Co Ho women play an / a / the active role in marriage. 9. The Ba Na are one of the / a / an oldest ethnic minority groups living in a / – / the Central Highlands. 10. The / A / – right of inheritance in Ede families is only for the / – / a daughters. 11. Y Phon lives in the city, but his family still live in a / the /–small village in a / – / the mountains. 12. A / The /– M’Nong live in houses built on the / – /a stilts or level with a/ – /the ground. Làm cho em với ạ
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