are we Talking about, "How to identify the equation?"
if yes, here's the answer
[tex] - \frac{1}{4} where \: in \: b \: is \: 1[/tex]
[tex] - \frac{4}{5} where \: in \: c \: is \: 4[/tex]
4-5=0
-1=0
-1+1=0+1
a=1