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

Toán Lớp 8: Thực hiện phép tính : $\frac{x+4}{5x-25}$ . $\frac{x-5}{x^2+8x+16}$

Toán Lớp 8: Thực hiện phép tính :
$\frac{x+4}{5x-25}$ . $\frac{x-5}{x^2+8x+16}$

Comments ( 2 )

  1. $\dfrac{x+4}{5x-25}\cdot \dfrac{x-5}{x^2+8x+16}$
    $=\dfrac{\left(x+4\right)\left(x-5\right)}{\left(5x-25\right)\left(x^2+8x+16\right)}$
    $=\dfrac{\left(x+4\right)\left(x-5\right)}{5\left(x-5\right)\left(x^2+8x+16\right)}$
    $=\dfrac{x+4}{5\left(x^2+8x+16\right)}$
    $=\dfrac{x+4}{5\left(x+4\right)^2}$
    $=\dfrac{x+4}{5\left(x+4\right)\left(x+4\right)}$
    $=\dfrac{1}{5\left(x+4\right)}$
     

  2. Mong cho lời giải hay nhất ❤️⭐️
    toan-lop-8-thuc-hien-phep-tinh-frac-4-5-25-frac-5-2-8-16

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

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