2 câu trả lời
Đáp án:
`x.(y - 3) = -6`
`-> x; (y - 3) ∈ Ư_{(-6)} = {1;-1;2;-2;3;-3;6;-6}`
Lập bảng giá trị
\begin{array}{|c|c|c|}\hline \text{x}&\text{1}&\text{-1}&\text{2}&\text{-2}&\text{3}&\text{-3}&\text{6}&\text{-6}\\\hline \text{y - 3}&\text{-6}&\text{6}&\text{-3}&\text{3}&\text{-2}&\text{2}&\text{-1}&\text{1}\\\hline \text{y }&\text{-3}&\text{9}&\text{0}&\text{6}&\text{1}&\text{5}&\text{2}&\text{4}\\\hline\end{array}
Vậy `(x,y) = ..`
$#dariana$
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