From the graphs we can observe that G(x) is 5 units to the left of F(x).
This means a horizontal translation of 5 units to the left of F(x) will result in G(x). Such a translation can be obtained from adding 5 to each x in the equation.
So,
G(x) = F(x+5)
F(x) = (x+5)²
So the correct answer is option D