Question

Tìm x€Z

2/x=x/8

Answer 1

2/x = x/8

=> x.x = 2.8

=> x² = 16

=> x² = 4² = (-4)²

=> x thuộc {-4; 4}.

Answer 2

Vì 2/x=x/8 nên

\(\Rightarrow\)2*8=x*x

16=x²

\(\Rightarrow\)x\(\in\){-4;4}

Answer 3

2/x=x/8 =>x.x=2.8 =>x² =16 =>x=4 hoặc x=-4

Answer 4

\(\frac{2}{x}=\frac{x}{8}\Rightarrow2.8=x.x\)

\(\Rightarrow16=x^2\)

\(x=\left\{-4;4\right\}\)