Question

What is the vertex of `y= x^2 - 4x - 3`?

Answer 1

`(2,-7)`

Explanation:

`(-b)/(2a)` is the `x` value for the maximum/minimum (vertex) of a quadratic graph. Work out what this value is and put it into the equation to find the `y` value.

`(--4)/(2)`=`4/2`=2 `x=2`

`=>` `y=2^2-4xx2-3`

`=>` `y=4-8-3`

`y=-7`