Question

tim x

\(\frac{x}{-5}=\frac{-180}{x}\)

 

Answer 1

Ta có : \(\frac{x}{-5}=\frac{-180}{x}\)

\(\Rightarrow x.x=\left(-180\right).\left(-5\right)\)

\(\Rightarrow x^2=900\)

\(\Rightarrow\left[\begin{array}{nghiempt}x=\sqrt{900}\\x=-\sqrt{900}\end{array}\right.\Rightarrow\left[\begin{array}{nghiempt}x=30\\x=-30\end{array}\right.\)

Vậy \(x=30;-30\)

Answer 2

\(\frac{x}{-5}=\frac{-180}{x}\)

\(\Rightarrow x^2=900\)

\(\Rightarrow x=\pm30\) (có nghĩa là x=30 hc x=-30)

Answer 3

x/ - 5 = - 180/ x

=> - 180 . - 5 = x . x

=> x^2 = 900

=> x = 30 hoặc x = -30