Question

2^2x + 2^(x+1) =4 - 2^x rezolvati in R
rezolvare completa va rog
(x =0)

Answer 1

2^2x + 2^(x+1) =4 - 2^x 
(2^x)^2 + 2^x *2 = 4-2^x
Notam solutia: t =2^x
t^2+t*2=4-t
t = 1
t = -4
Revenim:  2^x = 1
2^x = -4
deci x = 0