Question

Решите уравнение: 81*9^3x+x*9^3x=0

Answer 1

81*9^3x + x*9^3x=0
81*(3^2)^3x + x*(3^2)^3x = 0
81*(3^3x)^2 + x*(3^3x)^2 = 0
(3^3x)^2*(81+x) = 0
(27^x)^2*(81+x) = 0
(27^x)^2 = 0
81+x = 0, x = -81