Question

Gia tri x thoa man : x/-8 = -18/x la...

Answer 1

\(\dfrac{x}{-8}=\dfrac{-18}{x}\)

\(\Leftrightarrow x.x=\left(-8\right).\left(-18\right)\)

\(\Leftrightarrow x^2=144\)

\(\Leftrightarrow x^2=144\)

\(\Leftrightarrow\left[{}\begin{matrix}x=12\\x=-12\end{matrix}\right.\)

Vậy x=12 ; x=-12

Answer 2

\(\dfrac{x}{-8}=\dfrac{-18}{x}\)

\(\Leftrightarrow x.x=\left(-18\right).\left(-18\right)\)

\(\Leftrightarrow x^2=144\)

\(\Leftrightarrow\left[{}\begin{matrix}x=12\\x=\left(-12\right)\end{matrix}\right.\)

Vậy .................