Cho x,y thoa man dang thuc 3x2+16y2+12x-8xy+18=0. Vay x+y=?
cmr khong co cac so x,y,x thoa man moi dang thuc sau: A = 2x^2 + y^2 - 2xy + x + 2 = 0
3x2 +3y2 +4xy+2x -2y+2=0
tim x,y thoa man dang thuc
tim cac cap so nguyên (x,y) thoa man dang thuc
y(x-2)+3x-6=2
cau 1 cho x y la 2 so thoa man x2-y2 =2
vay gia tri cua bieu thuc A=2(x6-y6)-6(x4+y4)=.................
cau 2 ch da thuc A(X)=2X2 +ax+b
biet da thuc A(X) chia het cho da thuc B(x)=x-3 va C(x)=2x+1
vay 3a-2b=...................
Cho x,y,z la cac so thuc duong thoa man x + y + z = 6
Tim GTNN cua bieu thuc P = ( x + y )/(xyz)
im x,y thoa man: 2x^t2+4y^2-15xy-12x+45y-24=0 va x^2-2y^2-3x+3y+xy=0
Cho x, y thỏa mãn đẳng thức: \(3x^2+16y^2+12x-8xy+18=0 \)
Vậy \(x+y=\)
cho x,y,z la cac so thuc duong thoa man x+y+z=1 tim gia tri nho nhat cua bieu thuc M=1/16x+1/4y+1/z