Question

5^x-5^х-2=600 помогите плиз

Answer 1

$5^x-5^{x-2}=600~~~|cdot 5^2\ \ 25cdot 5^x-5^x=600cdot25\ \ 24cdot 5^x=600cdot 25~~~|:24\ \ 5^x=25cdot 25\ \ 5^x=5^4\ \ boxed{x=4}$