Tim bo ba x y z thoa man
X^2+2y^2+2^2-2(xy+2y+2z+8)=0
tim tat ca so tu nhien x y thoa man x^2=y^2(x+y^4+2y^2)
Tim x y z thoa man x^2+2y^2+z^2-2(xy+2y+2z+8)=0 can rat gap
tim tat ca cac so tu nhien x,y thoa man x^2=y^2(x+y^4+2y^2)
Tim bo ba x y z thoa man
X^2+2y^2+2^2-2(xy+2y+2z+8)=0
Giup Minh nha can gap lam
3x2 +3y2 +4xy+2x -2y+2=0
tim x,y thoa man dang thuc
cho 2 so x va y thoa man 3x+y=1
a) Tim GTNN cua bt M=3x^2+y^2
b) Tim GTLN cua bt N=x*y
tim cap so thuc (x,y) thoa man;(x+2y)2=(x+2).(y-1).
tim cac cap so nguyen(x;y) thoa man; x^2+6xy=18 va x-2y=-7/2*y
