Question

Please Help I'm Stuck On A Algebra Problem

Write the equation of the quadratic function with roots -1 and 1 and a vertex at (0, -3).

Answer 1

if -1 is a zero then (x+1) is a factor so the function is
f(x)= a(x+1)(x-1)
to determine (a)
use the point (0,-3)

Answer 2

Thanks that helped a little can you help a little further

Answer 3

Julian I'm still stuck

Answer 4

but i is alm,ost done u just need to make f(0) = -3 to find the constant (a)
this way
-3= a(0+1)*(0-1)
now solve for (a)

Answer 5

ok