Question

X ^{mũ 2} trừ 8 / 3= x²/6

Answer 1

\(\dfrac{x^2-8}{3}=\dfrac{x^2}{6}\)

\(\Leftrightarrow\dfrac{6\left(x^2-8\right)}{18}=\dfrac{3x^2}{18}\)

\(\Leftrightarrow6x^2-48=3x^2\)

\(\Leftrightarrow3x^2=48\)

\(\Leftrightarrow x^2=16\)

\(\Leftrightarrow x=\pm4\)

Answer 2

\(\dfrac{x^2-8}{3}\)=\(\dfrac{x^2}{6}\)

<=> \(\dfrac{2\left(x^2-8\right)}{6}\)=\(\dfrac{x^2}{6}\)

=> \(2x^2-16\)=\(x^2\)

<=> \(2x^2\)- \(x^2\)=16

<=>\(x^2\)=16

<=>\(x^2\)=(\(\pm\)4)\(^2\)

<=> x=\(\pm\)4