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

Toán Lớp 8: (x^2+2/x^3-1+x/x^2+x+1+1/1-x) : x-1/2

Tháng Tư 27, 2022 Toán học 1 Comment 0 views

Toán Lớp 8: (x^2+2/x^3-1+x/x^2+x+1+1/1-x) : x-1/2

Comments ( 1 )

  1. hoquyly
    hoquyly
    27 Tháng Tư, 2022 at 11:50 sáng
    Reply
    ((x^2+2)/(x^3-1)+x/(x^2+x+1)+1/(1-x)) : (x-1)/2(xne1)
    =((x^2+2)/((x-1)(x^2+x+1))+x/(x^2+x+1)-1/(x-1)) * 2/(x-1)
    =(1(x^2+2)+x(x-1)-1(x^2+x+1))/((x-1)(x^2+x+1)) * 2/(x-1)
    =(x^2+2+x^2-x-x^2-x-1)/((x-1)(x^2+x+1)) * 2/(x-1)
    =(x^2-2x+1)/((x-1)(x^2+x+1)) * 2/(x-1)
    =(x-1)^2/((x-1)(x^2+x+1)) * 2/(x-1)
    =2/(x^2+x+1)

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

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