a) S(1|1)
f(x) = 1 * (x - 1)^2 + 1
g(x) = -1 * (x - 1)^2 + 1
b) S(-5|-6)
f(x) = 1 * (x + 5)^2 - 6
g(x) = -1 * (x + 5)^2 - 6
c) S(-2/5|3/5)
f(x) = 1 * (x + 2/5)^2 + 3/5
g(x) = -1 * (x + 2/5)^2 + 3/5
d) S(-4,5|0)
f(x) = 1 * (x + 4.5)^2 + 0
g(x) = -1 * (x + 4.5)^2 + 0