a/ \(2^x=32\)
\(\Leftrightarrow2^x=2^5\)
\(\Leftrightarrow x=5\)
Vậy...
b/ \(\left(x+3\right)^2=81\)
\(\Leftrightarrow\left[{}\begin{matrix}x+3=9\\x+3=-9\end{matrix}\right.\) \(\Rightarrow\left[{}\begin{matrix}x=6\\x=-12\end{matrix}\right.\)
Vậy ....
c/ \(3^{x+3}=243\)
\(\Leftrightarrow3^{x+3}=3^5\)
\(\Leftrightarrow x+3=5\)
\(\Leftrightarrow x=2\)
Vậy ....
d/ \(\left(2x-5\right)^3=64\)
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