Tim so nguyen x,y biet
a) (x+5) mu 2 + (2y - 8 ) mu 2 = 0
b)(x + 3).(2y - 1 ) = 5
Tim x , y thuoc N a)x.y=24 va x<y b) (x+3).(y-2) =45 c) (2x+1) . (y-7)=150 d)2x-xy-3y=1
Bai 1 : Tim cac so nguyen x , y biet :
a, x +xy + y = 9
b, xy - 2x -3y = 5
c, xy - 2x + 5y = 2
Bai 1 : Tim cac so nguyen x , y biet :
a, xy - 2x -3y = 5
b, xy - 2x + 5y = 2
(x-3)(y-3)=9
(x-1)(xy+1)=2
(2x+1)(3y-2)=-55
xy-2x=5
a, [2x-1].[4y-2]=-42
b, x+xy+y=9
c, xy-2x-3y=5
Tìm n;x;y
1: n chia hết cho 21 và n+1 chia hết cho 165
2: 5x-xy=26-3y
3: 3x+xy-4x=3
4: y2-5y+2x=xy-6
5: y2+3x-xy=6y-4
6: xy-y2=3y-x-5
7: (2x+5y+1).(2|x|+y+x2+x)=105
tim x,y € z
xy-x+2y=3
2x^2+3y^2=77
tinh m=x^3+x^2y-2x^2-xy-y^2+3y+x-1 biet x+y-2=6
