Question

ПОМОГИТЕ РЕШИТЬ!!!
5^х-1+5^х+1=130
5^2х-4•5^х-5=0

Answer 1

$mathtt{5^{x-1}+5^{x+1}=130;~5^x+5^x*25=130*5;~5^x=frac{130*5}{26}=25~to~x=2}$

$mathtt{5^{2x}-4*5^x-5=0;~(5^x+1)(5^x-5)=0;~5^x-5=0~to~x=1}$