Question

What is the quadratic function that is created with roots -3 and 1 and a vertex at (-1, -8)?

Answer 1

f(x)=2(x+3)(x-1)

Answer 2

f(x) = -2x2 + 4x − 6

f(x) = 2x2 + 4x − 6

f(x) = 2x2 + 4x + 6

f(x) = -2x2 − 4x − 6

Answer 3

those are the only answers i can choose

Answer 4

y = a(x + 3)(x - 1)

-8 = a(-1 + 3)(-1 - 1)
-8 = -4a
2 = a

y = 2(x + 3)(x - 1)
y=2(x^2+2x-3)
y=2x^2+4x-6