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

Toán Lớp 9: rút gọn( x+1/x-1-x-1/x+1):(1/x+1-x1-x+2/x^2-1)

Home/ Toán Lớp 9: rút gọn( x+1/x-1-x-1/x+1):(1/x+1-x1-x+2/x^2-1)

Toán Lớp 9: rút gọn( x+1/x-1-x-1/x+1):(1/x+1-x1-x+2/x^2-1)

Tháng Hai 15, 2023 Toán học 2 Comments 0 views

Toán Lớp 9: rút gọn( x+1/x-1-x-1/x+1):(1/x+1-x1-x+2/x^2-1)

Comments ( 2 )

  1. tuminh25
    tuminh25
    15 Tháng Hai, 2023 at 9:02 sáng
    Reply
    ĐKXĐ: $x \neq 1;-1$
    $=(\dfrac{(x+1)^2-(x-1)^2}{(x-1)(x+1)}:\dfrac{x-1-x-1-x-2}{(x-1)(x+1)}$
    $=\dfrac{4x}{-2x-4}$
    $=\dfrac{2x}{-x-2}$

  2. buianhtuan
    buianhtuan
    15 Tháng Hai, 2023 at 9:01 sáng
    Reply
    Sửa $x1\to x^2$

    toan-lop-9-rut-gon-1-1-1-1-1-1-1-2-2-1

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

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