[Toán 8] Giúp với

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vansang02121998

[tex] A = \frac{x^4+x^3-x^2-2x-2}{x^4+2x^3-x^2-4x-2} [/tex]

[tex] A = \frac{x^4+x^3+x^2-2x^2-2x-2}{x^4+2x^3+x^2-2x^2-4x-2} [/tex]

[tex] A = \frac{x^2(x^2+x+1)-2(x^2+x+1)}{x^2(x^2+2x+1)-2(x^2+2x+1)} [/tex]

[tex] A = \frac{(x^2-2)(x^2+x+1)}{(x^2-2)(x^2+2x+1)} [/tex]

[tex] A = \frac{x^2+x+1}{x^2+2x+1} [/tex]
 
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