Question

Tìm \(x,y\in Z\) biết \(x\left(y-3\right)=12\)

Answer 1

\(\Leftrightarrow\left(x;y-3\right)\in\left\{\left(1;12\right);\left(12;1\right);\left(2;6\right);\left(6;2\right);\left(4;3\right);\left(3;4\right);\left(-1;-12\right);\left(-12;-1\right);\left(-2;-6\right);\left(-6;-2\right);\left(-3;-4\right);\left(-4;-3\right)\right\}\)

hay \(\left(x,y\right)\in\left\{\left(1;15\right);\left(12;4\right);\left(2;9\right);\left(6;5\right);\left(4;6\right);\left(3;7\right);\left(-1;-9\right);\left(-12;2\right);\left(-3;-1\right);\left(-4;0\right);\left(-2;-3\right);\left(-6;1\right)\right\}\)