Answer:
f(x) = -x^2 -6x - 1
Step-by-step explanation:
y=-x^2-6x-1
f(x)=-(x+3)^2+8
f(x)=-(x+3)(x+3)+8
f(x)=-(x^2+3x+3x+9)+8
f(x)=-x^2-3x-3x-9+8
f(x)=-x^2-6x-9+8
f(x)=-x^2-6x-1
