Question

What is the vertex of `y=1-4x-x^2`?

Answer 1

{-2,5}

Explanation:

`y=1-4x-x^2`

`(d y)/(d x)=0-4-2x=0`

`-4-2x=0`

`2x=-4" ; "x=-4/2=-2`

`y=1-4(-2)-(-2)^2`

`y=1+8-4`=5