Question

\(\frac{2}{x}=\frac{x}{9}:8\)

Answer 1

\(\frac{2}{x}=\frac{x}{9}:8=\frac{x}{9\cdot8}=\frac{x}{72}\)

=>\(\frac{2}{x}=\frac{x}{72}=x\cdot x=72\cdot2=144\)

=> x* x = 144

=>  x² = 144

=> x = 12 (vì 12² = 144)

Answer 2

\(\frac{2}{x}=\frac{x}{9}:8=\frac{x}{9}.\frac{1}{8}=\frac{x}{72}\Rightarrow x^2=2.72=2.36.2=2^2.6^2=12^2\Rightarrow x=12\)

Answer 3

x=-12 nữa

Answer 4

2/x=x/9.8

tđ 2/x=x/72

tđ x^2=2.72

tđ x^2= 144

tđ x=căn 144=12