`9 -(x-3)^2 -24(x-3) = 0`

`<=> (x-3) (9-24-x+3)=0`

`<=> (x-3) ( -12-x)=0`

\(\Leftrightarrow\left[{}\begin{matrix}x-3=0\\-12-x=0\end{matrix}\right.\\ \Leftrightarrow\left[{}\begin{matrix}x=3\\x=-12\end{matrix}\right.\)

Lần sau em vào đây để viết cho dễ hơn nha 

`5^(2x-3) - 2*5^2 =5^2.3`

`=> 5^(2x-3) - 2 * 25= 25*3`

`=> 5^(2x-3) - 50= 75`

`=> 5^(2x-3) =75+50`

`=> 5^(2x-3)=125`

`=> 5^(2x-3)=5^3`

`=> 2x-3=3`

`=> 2x=3+3`

`=> 2x=6`

`=>x= 6/2=3`

`5^2 x-^3`?