Question

Can someone explain this pleaae

Answer 1

i think the answer is but i am not a 100% 
 5.41853992195

Answer 2

Note that when adding logs of the same base you multiply the insides of the log. Therefore:
㏒8(2)+log8(4x²)=log8(8x²)
log8(8x²)=1
8=8x²
x=√1, x=1,x=-1