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

Toán Lớp 9: 3x+√9x-3 √x+1 √x+2 ====- – == + == x+√x-2 √x+2 1-√x Rú

Tháng Mười Hai 28, 2022 Toán học 1 Comment 0 views

Toán Lớp 9: 3x+√9x-3 √x+1 √x+2
————- – —— + ——
x+√x-2 √x+2 1-√x
Rút gọn giùm em với ạ.

Comments ( 1 )

  1. tuyen98
    tuyen98
    28 Tháng Mười Hai, 2022 at 2:30 chiều
    Reply
    (3x+\sqrt{9x}-3)/(x+\sqrt{x}-2)-(\sqrt{x}+1)/(\sqrt{x}+2)+(\sqrt{x}+2)/(1-\sqrt{x})
    =(3x+\sqrt{9x}-3)/((\sqrt{x}-1)(\sqrt{x}+2))-(\sqrt{x}+1)/(\sqrt{x}+2)-(\sqrt{x}+2)/(\sqrt{x}-1)
    =(3x+\sqrt{9x}-3-(\sqrt{x}+1)(\sqrt{x}-1)-(\sqrt{x}+2)^{2})/((\sqrt{x}-1)(\sqrt{x}+2))
    =(3x+\sqrt{9x}-3-x+1-x-4\sqrt{x}-4)/((\sqrt{x}-1)(\sqrt{x}+2)) =(-\sqrt{x}+x-6)/((\sqrt{x}-1)(\sqrt{x}+2))
    =((\sqrt{x}+2)(\sqrt{x}-3))/((\sqrt{x}-1)(\sqrt{x}+2))
    =(\sqrt{x}-3)/(\sqrt{x}-1)
     

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

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