Answer :
a -> - 1 ;
b -> 4a ;
c -> 3 ;
x = -b / (2a ) ;
x = -4a / ( - 2 ) ;
x = 2a ;
y = -(2a)^2 + (4a)×(2a) + 3 ;
y = -(4a^2) + 8a^2 + 3 ;
y = 4a^2 + 3 ;
The vertex of the function is ( 2a ; 4a^2 + 3 ) A).
b -> 4a ;
c -> 3 ;
x = -b / (2a ) ;
x = -4a / ( - 2 ) ;
x = 2a ;
y = -(2a)^2 + (4a)×(2a) + 3 ;
y = -(4a^2) + 8a^2 + 3 ;
y = 4a^2 + 3 ;
The vertex of the function is ( 2a ; 4a^2 + 3 ) A).