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

Toán Lớp 8: Rút gọn biểu thức sau: `\mathbb{M} = (2 (1 – 9x^2))/(3x^2 + 6x) : (2 – 6x)/(3x)`

Toán Lớp 8: Rút gọn biểu thức sau:
\mathbb{M} = (2 (1 – 9x^2))/(3x^2 + 6x) : (2 – 6x)/(3x)

Comments ( 2 )

  1. Giải đáp: M = $\frac{1+3x}{x+2}$ 
     
    Lời giải và giải thích chi tiết:
    M = $\frac{2(1-9x²)}{3x²+6x}$ :$\frac{2-6x}{3x}$ 
    M = $\frac{2(1-3x)(1+3x)}{3x(x+2)}$ : $\frac{2(1-3x)}{3x}$ 
    M = $\frac{2(1-3x)(1+3x)}{3x(x+2)}$ . $\frac{3x}{2(1-3x)}$ 
    M = $\frac{1+3x}{x+2}$ 
     Đánh giá 5* giúp chị nhé chị cảm ơn!

  2. \mathbb{M} = (2 (1 – 9x^2))/(3x^2 + 6x) : (2 – 6x)/(3x)
    = (2 (1^2 – (3x)^2))/(3x^2 + 6x) . (3x)/(2 – 6x)
    = (2 (1 + 3x)(1 – 3x))/(3x (x + 2)). (3x)/(2 (1 – 3x)
    = (2 (1 + 3x)(1 – 3x). 3x)/(3x (x + 2). 2(1 – 3x)
    = (1 + 3x)/(x + 2)

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

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