tim x,y nguyen thoa man : \(x^4+y+4=y^2-x^2\)
Tim x,y nguyen thoa man:x^4+y+4=y^2-x^2
tim cac cap so nguyen(x;y) thoa man; x^2+6xy=18 va x-2y=-7/2*y
tim tat ca cac so nguyen x,y thoa man x^3+x^2+2-2y=xy
tim tat ca so tu nhien x y thoa man x^2=y^2(x+y^4+2y^2)
Cho x,y,z la cac so nguyen duong thoa man 1/x + 1/y + 1/z = 2015.
Tim GTLN cua bieu thuc P=x+y/x^2+y^2 + y+z/y^2+z^2 + z+x/z^2+x^2
Tim cac so nguyen x,y thoa man: \(x^3+2x^2+3x+2=y^3\)
tim tat ca cac so tu nhien x,y thoa man x^2=y^2(x+y^4+2y^2)
Cho x, y la hai so thoa man 2x^2 + 1/x^2 +y^2/4 =4. Tim Max A= xy
