\(\int^{x\sqrt{y}+y\sqrt{x}=30}_{x\sqrt{x}+y\sqrt{y}=35}\Leftrightarrow\int^{\sqrt{xy}\left(\sqrt{x}+\sqrt{y}\right)=30}_{\left(\sqrt{x}+\sqrt{y}\right)^3-3\sqrt{xy}\left(\sqrt{x}+\sqrt{y}\right)=35}\)
\(\Leftrightarrow\int^{\sqrt{xy}\left(\sqrt{x}+\sqrt{y}\right)=30}_{\left(\sqrt{x}+\sqrt{y}\right)^3-90=35}\Leftrightarrow\int^{\sqrt{xy}=6}_{\sqrt{x}+\sqrt{y}=5}\)
giai he phuong trinh sau voi x , y la nghiem
(5m+1)x+(3m+2)y=15
(13m-14)x-(2m-5)y=9
tim gia tri cua m sao cho x+y=3
/x+y/ +/y-2/=2
/x-1/+y =3
giai he phuong trinh
giai he phuong trinh x/x-1 + 2y/y+2 = 3 va 2x/x-1 - y/y+2 = -4
giai he phuong trinh
x+2\x+1\y=4
1\x^2+1\xy+x\y=3
giai he phuong trinh
2(x+y) + √(x+1) = 4
(x+y) - 3√(x+1)=-5
giai he phuong trinh
x-y=3
x3-y3=9
giai he pt giup mk voi : (xy+y^2)(x+y)=-6 va x(y+1)=-1
giai he phuong trinh sau :
x^3 - x^2 y^2 - y^3 + 1 = 0 va x^3 + xy - 2 = 0
giai he phuong trinh :
x/5=y/7=z/3
2x-y+az=30
