Question

 5^x+2-5^x=120 решите уравнение

Answer 1

$5^{x+2} - 5^{x} =120......5^{x} *5 ^{2} -5 ^{x} =120.....5 ^{x} (5 ^{2}-1 )=120.....5 ^{x} = frac{120}{24} .....5 ^{x} =5 ^{1} .....x=1$.