Question

giúp mình 

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Answer 1

f: \(\Leftrightarrow5^{x-2}=2^4-2^{12}+2^{12}+3^2=25\)

hay x=4

Answer 2

\(5^{x-2}-3^2=2^4-\left(2^8.2^4-2^{10}.2^2\right)\)
\(5^{x-2 }-9=16-\left(2^{12}-2^{12}\right)\)
\(5^{x-2}-9=16\)
\(5^{x-2}=25\)
\(25=5^2và\left(-5^2\right)\)
=>x=4