Tim cac so nguyen x,y sao cho x - 2xy + y = 0
1.Tim cac cap so nguyen x,y sao cho x+y=2xy
2.Tim GTNN A = x2+3(x-1)2
Tim cac cap so nguyen (x,y) thoa man:x-y+2xy=3
tim so nguyen x y sao cho x-2xy+y=0
Tim so nguyen x,y sao cho; x-2xy+y=o
tim cac cap so nguyen duong nguyen to cung nhau sao cho: (x+y)/(x^2+y^2)=7/25
a.Tim 3 so a,b,c biet :3a=2b;5b=7c va 3a+5b-7c=60
b.tim cac cap so nguyen x,y sao cho x-2xy+y=0
Tim cac so nguyen x,y sao cho 112x+113y=1010
tim cac cap so nguyen duong nguyen to cung nhau sao cho: (x+y)/(x^2+y^2)=7/25
mk can gap lam
