Question

Answer 1

giúp mik vs,mik đg cần gấp.ailmxong rồi mik tick cho nha

 

Answer 2

Bài 11:

a: Ta có: \(\dfrac{x+2}{2}=\dfrac{8}{x+2}\)

\(\Leftrightarrow\left(x+2\right)^2=16\)

\(\Leftrightarrow\left[{}\begin{matrix}x+2=4\\x+2=-4\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=2\\x=-6\end{matrix}\right.\)

a: Ta có: \(\dfrac{x+4}{20}=\dfrac{5}{x+4}\)

\(\Leftrightarrow\left(x+4\right)^2=100\)

\(\Leftrightarrow\left[{}\begin{matrix}x+4=10\\x+4=-10\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=6\\x=-14\end{matrix}\right.\)