Question

Find the axis of the graph of the function.

f(x) = 4x^2 + 8x + 7

Answer 1

turn it to standard form
y=a(x-b)^2 +c
so x=b is axis of symmetry

Answer 2

So would it be -2?

Answer 3

4(x^2+2x) +7
=4 ((x+1)^2- 1)+7
=4(x+1)^ +7-3
so x=-1