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

Toán Lớp 9: x=1-2 căn x/căn x-1-x+căn x/căn x+1

Toán Lớp 9: x=1-2 căn x/căn x-1-x+căn x/căn x+1

Comments ( 1 )

  1. text{Giải đáp:}
    (x+1-2\sqrt{x})/(\sqrt{x}-1)-(x+\sqrt{x})/(\sqrt{x}+1)
    = (\sqrt{x}-1)^2/(\sqrt{x}-1)-(\sqrt{x}(\sqrt{x}+1))/(\sqrt{x}+1)
    = \sqrt{x}-1-\sqrt{x}
    = -1
    text{~ Học Tốt Nha ~}
     

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