A would be the answer
you have to combine like terms
so subtract 3 from each side and then you are left with b=0
x^2-2x+1=4 subtract 4 from both sides
x^2-2x-3 factor
(x-3)(x+1) set equal to zero
x=3, -1
I'm pretty sure it should be Absolute Maximum (Also called Global Maximum). Hope this helps! ^-^