=>\(\left(x-2;xy-1\right)\in\left\{\left(1;8\right);\left(8;1\right);\left(-1;-8\right);\left(-8;-1\right);\left(2;4\right);\left(4;2\right);\left(-2;-4\right);\left(-4;-2\right)\right\}\)
\(\Leftrightarrow\left(x,xy\right)\in\left\{\left(3;9\right);\left(10;2\right);\left(1;-7\right);\left(-6;0\right);\left(4;5\right);\left(6;3\right);\left(0;-3\right);\left(-2;-1\right)\right\}\)
\(\Leftrightarrow\left(x,y\right)\in\left\{\left(3;3\right);\left(10;\dfrac{1}{5}\right);\left(1;-7\right);\left(-6;0\right);\left(4;\dfrac{5}{4}\right);\left(6;\dfrac{1}{2}\right);\left(-2;\dfrac{1}{2}\right)\right\}\)
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