Question

What is the quadratic function that is created with roots -3 and 1 and a vertex at (-1, -8)? nswer as a function beginning with f(x). Format using this sample answer:f(x)=(3)(x^2-21x-19)

Answer 1

Since there are 2 roots.
-3 and 1

You can write that as:

x = -3 and x = 1

x + 3 = 0 and x -1 = 0

Answer 2

Now you have
(x+3)(x-1) = 0

Solve this using foil.

Answer 3

ok

Answer 4

whats foil?

Answer 5

im really bad at math especially this so can you explain please?

Answer 6

is that the answer? the x^2+2x-3 thing because i need it in the f(x) formant.

Answer 7

format

Answer 8

like this f(x)=(3)(x^2-21x-19)

Answer 9

Umm, yes.

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

Answer 10

ok thank you tons!