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

Toán Lớp 8: gấp a^2-7a+10/a^-5a rút gọn phân thức

Toán Lớp 8: gấp a^2-7a+10/a^-5a
rút gọn phân thức

Comments ( 2 )

  1. Giải đáp :
    (a^2-7a+10)/(a^2-5a)=((a-2)(a-5))/(a(a-5))=(a-2)/a

  2. (a²-7a+10)/(a²-5a)
    =(a²-2a-5a+10)/(a(a-5))
    =(a(a-2)-5(a-2))/(a(a-5))
    =((a-2)(a-5))/(a(a-5))
    =(a-2)/a

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