Đáp án: √(4+ √7) * √2 rút gọn thành 1+ √7 như thế nào ạ - Đáp án #Clickbim √((4+√(7)) √(2) √((4+√(7)2 = √(8+2√(7)) = √(7+1+2sqrt(7) = sqrt((sqrt(7))+1)^2 = ∣sqrt(7) + 1∣ = sqrt(7) + 1 Giải thích các bước giải

Đáp án #Clickbim √((4+√(7)) √(2) √((4+√(7)2 = √(8+2√(7)) = √(7+1+2sqrt(7) = sqrt((sqrt(7))+1)^2 = ∣sqrt(7) + 1∣ = sqrt(7) + 1 Giải thích các bước giải

(l)√ (4 + √ 7 ) √ 2 = √ (2( (4 + √ 7 ) )) = √ (8 + 2√ 7 ) = √ (7 + 1 + 21√ 7 ) = √ (((( (√ 7 + 1) ))^2)) = √ 7 + 1

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√(4+ √7) * √2 rút gọn thành 1+ √7 như thế nào ạ

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Quân Nguyễn

6 tháng trước

Đáp án:

#Clickbim

`\sqrt{(4+\sqrt{7}}` `.` `\sqrt{2}`

`\sqrt{(4+\sqrt{7}.2`

`=` `\sqrt{8+2\sqrt{7}}`

`=` `\sqrt{7+1+2sqrt{7}`

`=` `sqrt{(sqrt{7}}+1)^2`

`= |sqrt{7} + 1|`

`= sqrt{7} + 1`

Giải thích các bước giải:

Nguyễn Văn Quốc Hiếu

6 tháng trước

$\begin{array}{l}
\sqrt {4 + \sqrt 7 } .\sqrt 2 \\
= \sqrt {2\left( {4 + \sqrt 7 } \right)} \\
= \sqrt {8 + 2\sqrt 7 } \\
= \sqrt {7 + 1 + 2.1\sqrt 7 } \\
= \sqrt {{{\left( {\sqrt 7 + 1} \right)}^2}} = \sqrt 7 + 1
\end{array}$

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√(4+ √7) * √2 rút gọn thành 1+ √7 như thế nào ạ

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Choose the best answer.I think you should buy _____ pack of mineral water instead. And you can also buy _____ snacks such as potato crisps, 3 kilos of mandarins, 2 kilos of apples, 3 bunches of bananas, ______ cookies and soft candies.

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