Answer:
f(x + 8) = x² + 23x + 121
Step-by-step explanation:
f(x + 8) = (x + 8)² + 7(x + 8) + 1
f(x + 8) = x² + 16x + 64 + 7x + 56 + 1
Answer
f(x + 8) = x^2 + 23x + 121
