Hello! Please help with this question I would really appreciate it

Answer
You got the standard form correctly
Step-by-step explanation:
Multiply [tex](4x+6)^{2}[/tex]
f ( x ) = [tex]4x^{2}[/tex] + 48 x + 144+ 5
f ( x ) = [tex]4x^{2}[/tex] + 48 x + 149
4 is a
48 is b
149 is c