Question

Write the equation of the quadratic function with roots -10 and -8 and a vertex at (-9, -3).

Answer 1

please help me!

Answer 2

y = a(x - p)(x - q) is one form of a quadratic equation, where p and q are the roots.
Your equation is then
\[y = a(x+10)(x+8)\]

Answer 3

thank you so much!

Answer 4

not done yet. you have to find a

Answer 5

okay.

Answer 6

Plug in the coordinates for x and y and solve to solve for it

Answer 7

so that ould be (-9,-3) to plug in, right?

Answer 8

*would

Answer 9

yes

Answer 10

let me try, hold on...

Answer 11

a=3?

Answer 12

yes :)

Answer 13

thanks so much. you helped alot. i will fan. :)

Answer 14

you're welcome