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

Toán Lớp 8: a. (x + 3)(x – 3) – x(x – 2) =0

Toán Lớp 8: a. (x + 3)(x – 3) – x(x – 2) =0

Comments ( 2 )

  1. a. (x + 3)(x – 3) – x(x – 2) =0
    x^2-9-x^2+2x=0
    -9+2x=0
    2x=9
    x=9/2
     

  2. Đáp án:
     
    Giải thích các bước giải:
     

    toan-lop-8-a-3-3-2-0

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

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