Các câu hỏi tương tự
tim x,y thuoc z thoa 2(x^2+y^2)=1978
tim x,y thuoc z thoa x^2+xy+y^2=x^2y^2
tim x y thuoc z biet (x+y).2=xy
tim x,y thuoc Z biet 25-y^2=9(x-2018)^2
tim cac so x,y,z thuoc Q biet rang (x+y):(5-z):(y+z):(y+9)=3:1:2:5
tim x,y thuoc Z sao cho x^2+y^2=2020
tim x thuoc z biet y^2-x^2=102
tim x,y thuoc z biet 25-\(y^2\)=8.(x-2009)^2
tim cac gia tri x y thoa man
a,(x^2-1)(x^2-16)<0 va x thuoc Z
B,1/x-y/8=1/16 va x y thuoc N