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

Toán Lớp 8: (x^3+8):(x+2) giúp mình zới đi :((

Toán Lớp 8: (x^3+8):(x+2)
giúp mình zới đi :((

Comments ( 2 )

  1. (x^3+8):(x+2)
    =(x^3+8)/(x+2)
    =(x^3+2^3)/(x+2)
    =((x+2)(x^2-2x+4))/(x+2)
    =x^2-2x+4
    * a^3+b^3=(a+b)(a^2-ab+b^2)
     

  2. (x^3+8) : (x+2)
    =(x^3+8)/(x+2)
    =[(x+2)(x^2-2x+4)]/(x+2)
    =x^2-2x+4

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

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