The function y = f (x) is quadratic. If f (1 + x) = f (1-x), and the maximum value of F (x) is 15, the sum of two squares of F (x) = 0 is equal to 4

The function y = f (x) is quadratic. If f (1 + x) = f (1-x), and the maximum value of F (x) is 15, the sum of two squares of F (x) = 0 is equal to 4

Let f (x) = ax & # 178; + BX + C (a ≠ 0)
∵ f (1 + x) = f (1-x), and the maximum value of F (x) is 15,
∴a