5x+2 = 625
=> 5x+2 = 54
=> x + 2 = 4
=> x = 4 - 2
=> x = 2
ta có :5x+2 = 625 => 5x+2= 5^4=>x+2= 4
x = 2
Vậy x=2
Ta có: \(5^{x+2}=625\)
\(5^{x+2}=5^4\)
\(\Rightarrow x+2=4\)
\(\Rightarrow x=4-2\)
\(\Rightarrow x=2\)
5x+2 = 625
<=> 5x+2 = 54
<=> x + 2 = 4
<=> x = 2