Question

5^x+5^x+2=650

giúp mik nhanh nhanh nha

Answer 1

Theo b ài ra , ta có : 

\(5^x+5^{x+2}=650\)

\(\Rightarrow5^x+5^x.25=650\)

\(\Rightarrow5^x\left(1+25\right)=650\)

\(\Rightarrow5^x=650:26\)

\(\Rightarrow5^x=25\)

\(\Rightarrow5^x=5^2\)

\(\Rightarrow x=2\)

Vậy \(x=2\)

Answer 2

5^x + 5^x+2 = 650

5^x + 5^x+2 = 5² + 5⁴

=> x = 2

Answer 3

5^x + 5^x+2  = 650

5^x . 1 + 5^x . 25 = 650

5^x . ( 1 + 25 ) = 650

5^x . 26 = 650

5^x = 650 : 26

5^x = 25

5^x = 5²

=> x = 2