Question

Tìm x

\(\dfrac{x}{-12}=\dfrac{-18}{x}\)

Answer 1

\(x^2=261\)

\(\Rightarrow x=3\sqrt{29}\)

Answer 2

\(\dfrac{x}{-12}=\dfrac{-18}{x}\)

\(\Rightarrow x^2=\left(-12\right).\left(-18\right)\)

\(\Rightarrow x^2=216\)

\(\Rightarrow x=\varnothing\)

Answer 3

\(\dfrac{x}{-12}=\dfrac{-18}{x}\)

\(\Leftrightarrow x^2=216\)

hay \(x\in\left\{6\sqrt{6};-6\sqrt{6}\right\}\)

Answer 4

\(\dfrac{x}{-12}=\dfrac{-18}{x}\)

<=> x . x = -18 . (-12)

<=> x² = 216

<=> x = \(6\sqrt{6}\)

Answer 5

\(\dfrac{x}{-12}=\dfrac{-18}{x}\Leftrightarrow\dfrac{x}{12}=\dfrac{18}{x}\Rightarrow x^2=216\Rightarrow x=6\sqrt{6}\)