Answer:
11
Step-by-step explanation:
x= -b/2a
x= -8/2(-2)
x=-4/-2
x=2
f(2) = -2(2) +8(2)+ 3
f(2) = -8 +16 + 3
f(2) = 11
Maximum value is 11
it has a vertex at (2,11)
.
how to find the vertex;
function equation is f(x) = ax^2 + bx + c
we can find x by :-b/2a, -8/-4 = 2
and by putting the x value we get the y
