2^(16x)=16^(2x)
16=2⁴
2^(16x)=(2⁴)^(2x)
2^(16x)=2^(4*2x)
2^(16x)=2^(8x)
Therefore:
if a^n=a^m ⇒n=m
16x=8x
16x-8x=0
8x=0
x=0/8=0
Answer: x=0
What’s the choice so we can know give you the correct answer
91 is your composite number
Everything else is prime.