Answer:
5
Step-by-step explanation:
f(x+3) = (x+3)^2 - 4
factor (x+3)^2 using the formula (a+b)^2 = a^2 + 2ab + b^2
= x^2 + 6x + 9 - 4
= x^2 + 6x + 5
y-int : 5
