Question

2^(2x+1) + 2^(2x+3) + 4^(x+1) = 896
X=??
VA ROG!!

Answer 1

2^2x*2+2^2x*8+2^2x*4=2*2^2x(1+4+2)=896

14*2^2x=896

2^2x=64

4^x=4^3, deci rezulta ca x=3