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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 9: 3√x – 1 Q==== √x – 3 Tính Q biết x = 5- 2√6 please help me

Toán Lớp 9: 3√x – 1
Q=———
√x – 3
Tính Q biết x = 5- 2√6
please help me

Comments ( 2 )

  1. (3\sqrt{x}-1)/(\sqrt{x}-3)
    Ta có:
    5-2\sqrt{6}
    =3-2\sqrt{6}+2
    =(\sqrt{3})^2-2*\sqrt{3}*\sqrt{2}+(\sqrt{2})^2
    =(\sqrt{3}-\sqrt{2})^2
    Thay x=(\sqrt{3}-\sqrt{2})^2
    (3*\sqrt{(\sqrt{3}-\sqrt{2})^2}-1)/(\sqrt{(\sqrt{3}-\sqrt{2})^2}-3)
    =(3(\sqrt{3}-\sqrt{2})-1)/(\sqrt{3}-\sqrt{2}-3)
    =(3\sqrt{3}-\sqrt{6}-1)/(\sqrt{3}-\sqrt{2}-3)
     

  2. Giải đáp + giải thích các bước giải:
     

    toan-lop-9-3-1-q-3-tinh-q-biet-5-2-6-please-help-me

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222-9+11+12:2*14+14 = ? ( )

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