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

Toán Lớp 8: Rút gọn phân thức: $\frac{25x(2-x)}{15x(x-2)}$

Toán Lớp 8: Rút gọn phân thức: $\frac{25x(2-x)}{15x(x-2)}$

Comments ( 2 )

  1. Gửi bạn:
    $(ĐKXĐ:x\neq2,0)$
    $\dfrac{25x(2-x)}{15x(x-2)}$ 
    $=\dfrac{-25x(x-2)}{15x(x-2)}$ 
    $=\dfrac{-25x}{15x}$ 
    $=\dfrac{-25}{15}$ 
    $=-\dfrac{5}{3}$ 

  2. $\frac{25 x ( 2 − x )}{15 x ( x − 2 ) }$
    = $\frac{- 25 x ( x – 2 )}{15 x ( x − 2 ) }$
    = $\frac{-25x}{15x}$ 
    = $\frac{-25}{15}$ 
    = $\frac{-5}{3}$ 
     

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