tim cac so nguyen x,y biet
a)(x+5)2.(y-2)=8
b)(2x+4)10+(xy-y-6)=0
c)|x+y-5|+|x-y-3|=0
d)|(x-1)2-1|2015+4-(y-2)2017
tim x biet(x+1)+(x+2)+...+(x+2017)=0
tim x biet (x+1)+(x+2)+.........+(x+2017)=0
Tim cac so tu nhien x,y biet
A)(x-3)(y-2017)=0
B)xy-y=5
Tim so nguyen x,y biet:
a. (x+2).(x+5)>0
b.(x-1).(y-2)=12
tim x,y biet
(x-5).(y+1) =6
(x-5) .(x2.9) =0
Tim so nguyen x,y biet
(x+1)^2+(y-1)^2=0
(x+3)×(y+1)=3
xy-2x=5
Tim x, y thuoc Z biet : | x-2| + (x-y+1)^2 =0
tim so nguyen a, b biet a lon hon 0 va a.(b-2)=3
tim x,y biet (x-2).(y+1)=23