tim cac cap so nguyen duong (x,y) thoa man phương trình 6x2 + 5y2 = 74
tim cac cap so nguyên (x,y) thoa man dang thuc
y(x-2)+3x-6=2
tim cac cap so nguyen(x;y) thoa man; x^2+6xy=18 va x-2y=-7/2*y
Cho x,y,z la cac so thuc duong thoa man x + y + z = 6
Tim GTNN cua bieu thuc P = ( x + y )/(xyz)
cap so nguyen duong x y thoa man x(x-2)-(2-x)y-2(x-2)=3
Tim tat cac cac cap so nguyen x,y thoa man a) x^2+5xy+4y^2
b)xy-2x+3y-1
Tim tat cac cac cap so nguyen x,y thoa man a) x^2+5xy+4y^2
b)xy-2x+3y-1
Tim tat cac cac cap so nguyen x,y thoa man a) x^2+5xy+4y^2
b)xy-2x+3y-1
Tim cac so nguyen duong thoa man: 1/x+1/y=2/3
