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

Toán Lớp 8: 3x+9/x^2-1:x+3/x+1= 1+1=????????????

Toán Lớp 8: 3x+9/x^2-1:x+3/x+1= 1+1=????????????

Comments ( 2 )

  1. Giải đáp:
     
    Lời giải và giải thích chi tiết:
     [3x+9]/[x^2 -1]:[x+3]/[x+1]
    =[3(x+3)]/[(x-1)(x+1)] .[x+1]/[x+3]
    =3/[x-1]
    (Bài tham khảo)

  2. Answer
    $1.$
    $\dfrac{3x+9 ​ }{x^2+1}:$ $\dfrac{x+3}{x+1}$
    $=\dfrac{(3x+9)(x+1) ​ }{(x ^ 2 −1)(x+3) ​ }$
    $=\dfrac{3(x+1)(x+3)}{(x-1)(x+1)(x+3)}$
    $=\dfrac{3}{x-1}$
     

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