\(ĐKXĐ:x-3\ne0\Rightarrow x\ne3;x-1\ne0\Rightarrow x\ne1\\ \dfrac{1}{x-3}+2-1-\dfrac{5}{x-1}=0\\ \Leftrightarrow\dfrac{1}{x-3}+1-\dfrac{5}{x-1}=0\\ \Leftrightarrow\dfrac{1+x-3}{x-3}-\dfrac{5}{x-1}=0\\ \Leftrightarrow\dfrac{-2+x}{x-3}-\dfrac{5}{x-1}=0\\ \Leftrightarrow\dfrac{\left(-2+x\right)\left(x-1\right)}{\left(x-3\right)\left(x-1\right)}-\dfrac{5\left(x-3\right)}{\left(x-3\right)\left(x-1\right)}=0\\ \Leftrightarrow\dfrac{x^2-3x+2}{\left(x-3\right)\left(x-1\right)}-\dfrac{5x-15}{\left(x-3\right)\left(x-1\right)}=0\\ \Leftrightarrow\dfrac{x^2-3x+2-5x+15}{\left(x-3\right)\left(x-1\right)}=0\\ \Rightarrow x^2-8x+17=0\\ \Leftrightarrow\left(x^2-8x+16\right)+1=0\\ \Leftrightarrow\left(x-4\right)^2=-1\left(vô lí\right)\)
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