bài 11.rút gọn biểu thức:a,dfrac{9x^2}{11y^2}:dfrac{3x}{2y}:dfrac{6x}{11y} b,dfrac{3x+15y}{x^3-y^3}:dfrac{x+5y}{x-y} c,dfrac{x^2-1}{x^2-4x+4}:dfrac{x+1}{2-x} d,dfrac{5x+10}{x+2}:dfrac{5y}{x} e,dfrac{2x}{3x-3y}:dfrac{x^2}{x-y} f,dfrac{5x-3}{4x^2y}-dfrac{x-3}{4x^2y} g,dfrac{3x+10}{x+3}-dfrac{x+4}{x+3} h,dfrac{4}{x-1}+dfrac{2}{1-x}+dfrac{x}{x-1} i,dfrac{2x^2-x}{x-1}+dfrac{x+1}{1-x}+dfrac{2-x^2}{x-1} j,dfrac{x-2}{x-6}-d...
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bài 11.rút gọn biểu thức:
\(a,\dfrac{9x^2}{11y^2}:\dfrac{3x}{2y}:\dfrac{6x}{11y}\) \(b,\dfrac{3x+15y}{x^3-y^3}:\dfrac{x+5y}{x-y}\)
\(c,\dfrac{x^2-1}{x^2-4x+4}:\dfrac{x+1}{2-x}\) \(d,\dfrac{5x+10}{x+2}:\dfrac{5y}{x}\)
\(e,\dfrac{2x}{3x-3y}:\dfrac{x^2}{x-y}\) \(f,\dfrac{5x-3}{4x^2y}-\dfrac{x-3}{4x^2y}\)
\(g,\dfrac{3x+10}{x+3}-\dfrac{x+4}{x+3}\) \(h,\dfrac{4}{x-1}+\dfrac{2}{1-x}+\dfrac{x}{x-1}\)
\(i,\dfrac{2x^2-x}{x-1}+\dfrac{x+1}{1-x}+\dfrac{2-x^2}{x-1}\) \(j,\dfrac{x-2}{x-6}-\dfrac{x-18}{6-x}+\dfrac{x+2}{x-6}\)
\(k,\dfrac{x}{x^2-4}+\dfrac{2}{2-x}+\dfrac{1}{x+2}\) \(m,\dfrac{3}{2x+6}-\dfrac{x-6}{2x^2+6x}\)
\(n,\dfrac{3}{x+3}-\dfrac{x-6}{x^2+3x}\) \(p,\dfrac{x+3}{x}-\dfrac{x}{x-3}+\dfrac{9}{x^2-3x}\)
