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

Toán Lớp 8: Chobiểu thức????= ???? / ????+2+ 3 /????−2 − ????^2−2???? / ????^2−4(Với x ≠ ± 2) a) Rút gọn biểu thức A

Toán Lớp 8: Chobiểu thức????= ???? / ????+2+ 3 /????−2 − ????^2−2???? / ????^2−4(Với x ≠ ± 2)
a) Rút gọn biểu thức A

Comments ( 2 )

  1. Gửi bạn:
    $ĐKXĐ:x\neq -2;2$
    $A=\dfrac{x}{x+2}+\dfrac{3}{x-2}-\dfrac{x^2-2x}{x^2-4}$ 
    $A=\dfrac{x}{x+2}+\dfrac{3}{x-2}-\dfrac{x(x-2)}{x^2-4}$ 
    $A=\dfrac{x}{x+2}+\dfrac{3}{x-2}-\dfrac{x(x-2)}{(x-2)(x+2)}$ 
    $A=\dfrac{x}{x+2}+\dfrac{3}{x-2}-\dfrac{x}{x+2}$ 
    $A=\dfrac{3}{x-2}$ 

  2. Chúc bạn học tốt!!!!
    vote 5*, ctlhn 

    toan-lop-8-chobieu-thuc-2-3-2-2-2-2-4-voi-2-a-rut-gon-bieu-thuc-a

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