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

Toán Lớp 8: `\frac{1-4x^2}{x^2+4x}:\frac{2-4x}{3x}` Thực hiện phép tính =)

Toán Lớp 8: \frac{1-4x^2}{x^2+4x}:\frac{2-4x}{3x}
Thực hiện phép tính =)

Comments ( 2 )

  1. Mong cho lời giải hay nhất ❤️⭐️
    toan-lop-8-frac-1-4-2-2-4-frac-2-4-3-thuc-hien-phep-tinh

  2. Giải đáp:

     $\dfrac{1-4x^2}{x^2+4x}:\dfrac{2-4x}{3x}$

    $= \dfrac{(1-2x).(1+2x)}{x.(x+4)}.\dfrac{3x}{2.(1-2x)}$

    $= \dfrac{(1-2x).(1+2x).3x}{x.(x+4).2.(1-2x)}$

    $= \dfrac{(1+2x).3}{(x+4).2}$

    $= \dfrac{3+6x}{2x+8}$

     

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

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