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

Toán Lớp 8: $\frac{5x+2}{x²-5x}$ x $\frac{x+5}{3-x}$

Toán Lớp 8: $\frac{5x+2}{x²-5x}$ x $\frac{x+5}{3-x}$

Comments ( 1 )

  1. Giải đáp:
     $\dfrac{5x+2}{x²-5x}.\dfrac{x+5}{3-x}$
    $= \dfrac{(5x+2).(x-5)}{x.(x+5).(3-x)}$
    $= \dfrac{5x²-23x-10}{-x³+3x²-5x+15}$
     

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

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