Đáp án: (√4 + √15 ÷4- √15)+(√4 - √15 ÷4-+√15) - Đáp án ((38)/( - 11)) Giải thích các bước giải (l)((√ 4 + √ (15) )/(√ 4 - √ (15) )) + ((√ 4 - √ (15) )/(√ 4 + √ (15) )) = ((((( (√ 4 + √ (15) ) ))^2) + ((( (√ 4 - √ (15) ) ))^2))/(( (√ 4 + √ (15) ) )( (√ 4 - √ (15) ) ))) = ((4 + 22√ (15) + 15 + 4 - 22√ (15) + 15)/(4 - 15)) = ((38)/( - 11))

Đáp án ((38)/( - 11)) Giải thích các bước giải (l)((√ 4 + √ (15) )/(√ 4 - √ (15) )) + ((√ 4 - √ (15) )/(√ 4 + √ (15) )) = ((((( (√ 4 + √ (15) ) ))^2) + ((( (√ 4 - √ (15) ) ))^2))/(( (√ 4 + √ (15) ) )( (√ 4 - √ (15) ) ))) = ((4 + 22√ (15) + 15 + 4 - 22√ (15) + 15)/(4 - 15)) = ((38)/( - 11))

Nguyễn Xuân

6 tháng trước

(√4 + √15 ÷4- √15)+(√4 - √15 ÷4-+√15)

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Đặng Phương

6 tháng trước

Đáp án:

\(\dfrac{{38}}{{ - 11}}\)

Giải thích các bước giải:

\(\begin{array}{l}
\dfrac{{\sqrt 4 + \sqrt {15} }}{{\sqrt 4 - \sqrt {15} }} + \dfrac{{\sqrt 4 - \sqrt {15} }}{{\sqrt 4 + \sqrt {15} }}\\
= \dfrac{{{{\left( {\sqrt 4 + \sqrt {15} } \right)}^2} + {{\left( {\sqrt 4 - \sqrt {15} } \right)}^2}}}{{\left( {\sqrt 4 + \sqrt {15} } \right)\left( {\sqrt 4 - \sqrt {15} } \right)}}\\
= \dfrac{{4 + 2.2\sqrt {15} + 15 + 4 - 2.2\sqrt {15} + 15}}{{4 - 15}}\\
= \dfrac{{38}}{{ - 11}}
\end{array}\)

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Choose the best answer.
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(√4 + √15 ÷4- √15)+(√4 - √15 ÷4-+√15)

1 câu trả lời

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việt nam dành độc lập vào năm nào

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.

Choose the best answer.We should decorate our living room with _____ orange banner. We also need ________ ribbons, balloons, party hats and costume.

Choose the best answer.I think that ______ cauliflower is not enough for 3 people. Let’s buy one more.

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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.

Choose the best answer.
We should decorate our living room with _ orange banner. We also need ____ ribbons, balloons, party hats and costume.

Choose the best answer.
I think that ______ cauliflower is not enough for 3 people. Let’s buy one more.