Question

1) 5^2х + 5^2х+1 = 150.

Answer 1

$5^{2x}+5^{2x+1}=150$
$5^{2x}+5*5^{2x}=150$
$(1+5)*5^{2x}=150$
$6*5^{2x}=150$
$5^{2x}=150:6$
$5^{2x}=25$
$5^{2x}=5^2$
$2x=2$
$x=2:2$
$x=1$
ответ: 1