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

Toán Lớp 8: Làm tính chia ạ !! Làm tính chia 1) (x^3-3x^2 +x-3):(x-3) 2) (2x^4 – 5x^2 +x – 3– 3x):(x² – 3) 3) (x-y-z): (x-y- z)

Toán Lớp 8: Làm tính chia ạ !!
Làm tính chia
1) (x^3-3x^2 +x-3):(x-3)
2) (2x^4 – 5x^2 +x – 3– 3x):(x² – 3)
3) (x-y-z): (x-y- z)

Comments ( 2 )

  1. (x^3-3x^2+x-3):(x-3)
    =\frac{x^2(x-3)+x-3}{x-3}
    =\frac{(x^2+1).(x-3)}{x-3}
    =x^2+1
    ___________________________
    (2x^4-5x^2+x^3-3-3x):x^2-3
    =\frac{2x^4-6x^2+x^3-3-3x+x^2}{x^2-3}
    =\frac{2x^2.(x^2-3)+x.(x^2-3)+x^2-3}{x^2-3}
    =\frac{(2x^2+x+1).(x^2-3)}{x^2-3}
    =2x^2+x+1
    _____________________________________
    (x-y-z)^5:(x-y-z)^3
    =\frac{(x-y-z)^5}{(x-y-z)^3}
    $=(x-y-z)^5$$^-$$^3$
    =(x-y-z)^2
    ____________________________
    #Wuang
     

  2. Giải đáp+Lời giải và giải thích chi tiết:
    (x-y-z)^5 : (x-y-z)^3
    =(x-y-z)^{5-3} 
    =(x-y-z)^2
         Bạn xem hình ạ!
    #LinhSad

    toan-lop-8-lam-tinh-chia-a-lam-tinh-chia-1-3-3-2-3-3-2-2-4-5-2-3-3-3-3-y-z-y-z

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

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