X² +2x+1/3x +3 rút gọn ạ 3x +2 /x² – 4 × x² -2x / 6x + 4 rút gọn ạ

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1. ` \frac{x^2 + 2x + 1}{3x + 3} `

   ` = \frac{(x + 1)^2}{3(x + 1)} `

   ` = \frac{x + 1}{3} `

   ` \frac{3x + 2}{x^2 – 4} . \frac{x^2 – 2x}{6x + 4} `

   ` = \frac{3x + 2}{(x – 2)(x + 2)} . \frac{x(x – 2)}{2(3x + 2)} `

   ` = \frac{1}{x + 2} . \frac{x}{2} ` (rút gọn chéo)

   ` = \frac{x}{2(x + 2)} `

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