Similarto other Q's asked this day:
axis of symmetry is x = -4 ( from vertex)
this is given by x = -b/2a
-4 = -b/2 so b = 8
x^2 + 8x + c has the point -4,8 sub this in to calculate 'c'
(-4)^2 + 8 (-4) + c = 8
16 -32 + c = 8
c = 24 Now add b + c .................
