x[y-3]+y-3=-20-3
x[y-3]+1[y-3]=-23
[x+1][y-3]=-23
-23=-1.23=-23.1
tiếp theo tự làm nhé
xy-3x+y-3+3=20
=>(xy-3x)+(Y-3)=-23
=>x.(y-3)+(y-3)
=>(y-3)+(x+1)
Vì \(x,yez\) nên (y-3);(x+1)
=> (y-3);(x+1) e B (-23)
y-3 | -23 | 23 | 1 | -1 |
x+1 | 1 | -1 | -23 | 23 |
y | -20 | 23 | 4 | 2 |
x | 0 | -2 | -24 | 22 |