00:01
We're given a quadratic equation.
00:03
We first want to find the vertex of this parabola.
00:09
To find the vertex, we start with the x coordinate, which we find by taking opposite of b over 2a.
00:18
For this problem, b is 8, so opposite of 8 is negative 8 over 2 times negative 4.
00:28
That's negative 8 over negative 8, which is positive 1.
00:32
I now want to find the y coordinate, which i find by taking f of opposite of b over 2a.
00:43
So since that result was 1, i want f of 1.
00:47
It's going to give me negative 4 plus 8 plus 14, which is going to give me 4 plus 14 or 18.
01:02
My vertex is at the point 118.
01:13
I want the vertical intercept or the y intercept.
01:21
That's the value of the function when x is zero...