Bài 2:
d: \(\Leftrightarrow\left[{}\begin{matrix}2x-1=9\\2x-1=-9\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=5\\x=-4\end{matrix}\right.\)
\(f.24-2\left(x+1\right)=3^5:3^2-5.\left(9-3\right)^0\\24-2\left(x+1\right)=3^3-5.6^0\\ 24-2\left(x+1\right)=27-5.1\\ 24-2\left(x+1\right)=27-5\\ 24-2\left(x+1\right)=22\\ 2\left(x+1\right)=24-22\\ 2\left(x+1\right)=2\\ x+1=2:2\\ x+1=1\\ x=1-1\\ x=0\)
d, (2x-1)2= 81 e, (x-3.4^2)3= 64
=> (2x-1)2= 92 (x-3.16)3= 4^3
=> 2x-1=9 x-48 = 4
=> 2x=10 x = 4+48= 52
=> x= 10:2 Vậy...
=> x=5
Vậy ...
