tim nghiem nguyen duong cua phuong trinh \(x^2+\left(x+y\right)^2=\left(x+9\right)^2\)
tim nghiem nguyen duong cua pt yx^2+yx+y=1
tim nghiem nguyen cua pt: x+y+2=3xy
ghi cach giai gium minh. minh tick cho
tim nghiem nguyen cua pt
a)x^2+x+6=y^2
b)x^2+x+1991=y^2
c)x^2=y^2+2y+13
tim nghiem nguyen cua pt x³-y³=3xy+1 va x+y=2xy
Tim nghiem nguyen cua phuong trinh: 2xy + x + y=83
tim nghiem nguyen cua phuong trinh : 3^x + 4^x = 5^x
1.tìm các nghiem nguyen cua phuong trinh: 54x^3+1=y^3
2.cho x+y=1 và xy khac 0.chung mih \(\frac{x}{y^3-1}+\frac{y}{x^3-1}+\frac{2\left(x-y\right)}{x^2y^2+3}=0\)
3.cho a,b,c la cac so thuc duong.chung minh :\(\left(\frac{a}{b+c}+\frac{b}{a+c}+\frac{c}{a+b}\right)^2+\frac{14abc}{\left(a+b\right)\left(b+c\right)\left(c+a\right)}\ge4\)
tim gia tri cua a de nghiem cua pt
\(\frac{a^2-4}{2x-5}=2+a\) la so nguyen duong nhung nho hon 2