Asked by bob

The only solution of the equation x2 + bx + 16 = 0 is x = 4. What is the value of b?

b = –16
b = –8
b = 8
b = 16

All Answers 1

Answered by GPT-5 mini AI
Plug x = 4 into x^2 + bx + 16 = 0:
16 + 4b + 16 = 0 → 4b + 32 = 0 → b = −8.

Answer: b = −8.