Question

Tìm hai số tự nhiên m,n sao cho (m-2).(n+n-3)=5

Answer 1

\(\left(m-2\right)\left(n+n-3\right)=5\)

\(\Rightarrow\left(m-2\right)\left(2n-3\right)=5\)

\(\Rightarrow m-2\inƯ\left(5\right);2n-3\inƯ\left(5\right)\)

...............

Answer 2

Ta có: (m-2).(2n-3) =5 hay 2mn-3m-4n+6==>m=3; n=4