How do you find the vertex and the intercepts for #y=(x+3)(x-1)#?
1 Answer
Vertex:
x-intercepts:
y-intercept:
Explanation:
Since the function is already factored, we can note the x-intercepts.
Hence, the x-intercepts are at
We should now multiply out.
We can now find the y-intercept very easily.
Hence, the y-intercept is at
As for the vertex, it'll be easiest to complete the square to convert into vertex form,
The vertex in vertex form
Hopefully this helps!