College Algebra 7th Edition

$\dfrac{x-2}{x-1}$
Factor each polynomial to obtain: $=\dfrac{(x-2)(x+1)}{(x-1)(x+1)}$ Cancel the common factors to obtain: $\require{cancel} =\dfrac{(x-2)\cancel{(x+1)}}{(x-1)\cancel{(x+1)}} \\=\dfrac{x-2}{x-1}$