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

Toán Lớp 8: Thực hiện phép tính:x+1/3(x-2):x/3(x^2-4x+1)

Toán Lớp 8: Thực hiện phép tính:x+1/3(x-2):x/3(x^2-4x+1)

Comments ( 1 )

  1. $@Doraemon28$
    (x+1)/(3(x-2)):(x)/(3(x^2-4x+1))
    =(x+1)/(3(x-2))*(3(x^2-4x+1))/x
    =(x+1)/(x-2)*(x^2-4x+1)/(x)
    =((x+1)*(x^2-4x+1))/(x*(x-2))
    =(x^3-4x^2+x+x^2-4x+1)/(x^2-2x)
    =(x^3-3x^2-3x+1)/(x^2-2x) 

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

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