Question

Tìm các số nguyên x, sao cho

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

Answer 1

\(\frac{2}{x}=\frac{x}{8}\Rightarrow x^2=8.2=16\Rightarrow x\in\left\{-4;4\right\}\)

Answer 2

=>x^2=16=>x=4 hoặc -4

Answer 3

2.8=x.x 

=> x² =16 

=> x=4 hoac -4

Answer 4

\(\frac{2}{x}=\frac{x}{8}\Rightarrow x^2=8.2=16\)

\(\Rightarrow\) x=4 hoặc x=-4

Answer 5

2/x =x/8 suy ra 2.8=x.x

                        16=x^2

mà 16=4^2 suy ra x=4