Question

x/-25 = -16/x

Answer 1

\(\frac{x}{-25}=-\frac{16}{x}\)

\(\Rightarrow x^2=-16.\left(-25\right)\)

\(\Rightarrow\)\(x^2=400\)

\(\Rightarrow x=\sqrt{400}\)

\(\Rightarrow x=20\) hoặc \(x=-20\)

~~~Chúc bn học tốt~~~

Answer 2

\(\frac{x}{-25}=\frac{-16}{x}\)

⇔ x²=400

⇔ \(\left[{}\begin{matrix}x=20\\x=-20\end{matrix}\right.\)

Answer 3

\(\frac{x}{-25}=\frac{-16}{x}\\ \Leftrightarrow x^2=400\\\Rightarrow x^{^2}=\pm20^2\\ \Rightarrow x=\pm20\)

Answer 4

\(\frac{x}{-25}=\frac{-16}{x}\)

=> \(x.x=\left(-16\right).\left(-25\right)\)

=> \(x.x=400\)

=> \(x^2=400\)

=> \(\left[{}\begin{matrix}x=20\\x=-20\end{matrix}\right.\)

Vậy \(x\in\left\{20;-20\right\}.\)

Chúc bạn học tốt!