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

Toán Lớp 8: thực hiện phép cọng đa thức $\frac{x-2y}{2x-y}$ + $\frac{x+y}{2x-y}$

Toán Lớp 8: thực hiện phép cọng đa thức
$\frac{x-2y}{2x-y}$ + $\frac{x+y}{2x-y}$

Comments ( 2 )

  1. $\text{- Giải:}$
         $\dfrac{x-2y}{2x-y}+\dfrac{x+y}{2x-y}$
    $=\dfrac{x-2y+x+y}{2x-y}$
    $=\dfrac{2x-y}{2x-y}$
    $=1$

  2. (x-2y)/(2x-y) + (x+y)/(2x-y)
    = (x-2y+x+y)/(2x-y)
    = ((x+x)+(y-2y))/(2x-y)
    = (2x-y)/(2x-y)
    = 1

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