Question

[Bạch Thu Thảo]

Bài 1:

a) \(a)\left(x^2+y\right)\left(y^2+x\right)=\left(x-y\right)^2\) ^{\(x,y\in Z\)}

\(b)x^2\left(y+3\right)=yz^2\) \(x,y,z\in Z_+\)

\(c)x\left(x+1\right)\left(x+7\right)\left(x+8\right)=y^2\) \(x,y\in Z_+\)

\(d)x^4+x^2-y^2+y+10=0\) \(x,y\in Z\)

\(e)x^3-y^3-2y^2-3y-1=0\) \(x,y\in Z_+\)

\(f)x^4-y^4+z^4+2x^2y^2+3x^2+4z^2+1=0\) \(x,y,z\in Z\)

Answer 1

[hattori heiji]

đề

Answer 2

[Bạch Thu Thảo]

Tìm x,y,z biết