Question

\(\dfrac{x+3}{8}=\dfrac{2}{x-3}\)

Answer 1

\(\dfrac{x+3}{8}\) = \(\dfrac{2}{x-3}\)

⇔ (x+3)(x-3)=16

⇔ x² -9 =16

⇔x² = 25

⇔ x=5; x=-5

Answer 2

\(\dfrac{x+3}{8}=\dfrac{2}{x-3}\)

\(\Rightarrow\left(x+3\right)\left(x-3\right)=2.8\)

\(\Rightarrow x^2-9=16\)

\(\Rightarrow x^2=25\)

\(\Rightarrow x=\pm5\)

Vậy \(x=\pm5\)