PLEASE HELP ASAP 25 PTS + BRAINLIEST RIGHT/BEST ANSWER

Answer:
1 -4i
Step-by-step explanation:
1-sqrt(-16)
We know that sqrt(ab) = sqrt(a) sqrt(b)
1 - sqrt(16) sqrt(-1)
Assuming we take the principal value of the square root
The square root of -1 is i
1 -4i