Heyy guys can you help me pleasee????
Can you tell me how to find the quadratic equation for (4,-1) ?? That is the vertex point. I need to find the roots, Please help!! :[

Question

Heyy guys can you help me pleasee????
Can you tell me how to find the quadratic equation for (4,-1) ?? That is the vertex point. I need to find the roots, Please help!! :[

anonymous · Answer

you need more than just one point to find the roots 
if you just have the vertex that is not enough

anonymous · Answer

do you have any other piece of information?  two more points?  a picture?

anonymous · Answer

i really dont remember /: uh dont you have to use the equation (x-h)^2+k??

raden · Answer

y = a(x-h)^2+k
with a=constant, h,k is vertex
so, to find a, u need an extra point coordinat again

anonymous · Answer

i think i got it now guys, thanks thou, i really appreciate it

anonymous · Answer

you can use 
$y=a(x-4)^2-1$ but this will not help you find the zeros because you do not know what $a$ is without some other point known to you