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

Toán Lớp 8: `A=x.x^2-2x+x^2-2x` chia hết cho `x-2` Làm nhanh giúp ạ

Toán Lớp 8: A=x.x^2-2x+x^2-2x chia hết cho x-2
Làm nhanh giúp ạ

Comments ( 1 )

  1. A=x.x^2-2x+x^2-2x
    A=x.(x^2-2x+x-2)
    A=x.{(x.(x+1)-2.(x+1)}
    A=x.{(x-2).(x+1)}
    $⇒ (x-2).(x+1) \vdots (x-2)$
    $⇒x.{(x-2).(x+1)} \vdots (x-2)$
    Hay $A=x.x^2-2x+x^2-2x \vdots (x-2)$ (đpcm)
     

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