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chikiet2k
2 năm trước
30 điểm nha mn , thật ra dễ thôi nhưng mik muốn so sánh kết quả a) $\frac{2}{x^2 -1}$ - $\frac{1}{x^2 + x}$ + $\frac{x^2-3}{x^3-x}$ b)($\frac{x}{x^2 -36}$ - $\frac{x-6}{x^2+6x}$ ) : $\frac{2x-6}{x^2+6x}$+ $\frac{6}{6-x}$ c) $\frac{x^3-8}{5x+20}$ .$\frac{x^2+4x}{x^2+2x+4}$
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