Question

How do I find the x-intercepts for the graph of `y=x^2-3x-4`?

Answer 1

You set `y = 0` and solve for `x`.

Explanation:

`y = x^2–3x-4 = 0`

`(x+1)(x-4) = 0`

`x+1 = 0 or x-4 = 0`

`x = -1` or `x = 4`

The `x`-intercepts are at (`-1,0`) and (`4,0`).