dài quá em ko viết đc

mõi câu hỏi chỉ được một k thôi mà

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Part IV. Rewrite the sentences beginning with “S + wish + S + V2/ed… or Passive form”.

37. I don’t know French.
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38. She can take her dog for a walk.
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39. My parents live very far from Ho Chi Minh City.
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40. You must wash this dress.
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41. She isn’t a famous singer.
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42. They must prepare meals every day.
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\(A=\sqrt{9+\sqrt{17}}-\sqrt{9-\sqrt{17}}\)

\(\Leftrightarrow A^2=\left(\sqrt{9+\sqrt{17}}-\sqrt{9-\sqrt{17}}\right)^2\)

\(=9+\sqrt{17}-2\sqrt{9+\sqrt{17}}.\sqrt{9-\sqrt{17}}+9-\sqrt{17}\)

\(=18-2\sqrt{81-17}=18-2.8=2\)

\(\Rightarrow A=\sqrt{2}\)

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15 x 28 = 

\(x+2\sqrt{x-2}-17=0\)đk : x >= 2 

\(\Leftrightarrow x-2+2\sqrt{x-2}+1-16=0\)

\(\Leftrightarrow\left(\sqrt{x-2}+1\right)^2=16\)

TH1 : \(\sqrt{x-2}+1=4\Leftrightarrow\sqrt{x-2}=3\Leftrightarrow x-2=9\Leftrightarrow x=11\)

TH2 : \(\sqrt{x-2}+1=-4\Leftrightarrow\sqrt{x-2}=-5\)( ktm )