00:01
So i want to use a graphical approach to solve this system.
00:09
I'm going to just use different colors so that you can tell them apart.
00:17
So my first equation has a parabola that's x squared plus 9x.
00:25
So that's a parabola that has x intercepts at 0 and at negative 9.
00:38
So that tells me that my vertex is at negative 4 .5 and the y coordinate of that vertex is going to be a little more than negative 20.
00:52
So negative 1, 2, 3, 4 and a half.
00:55
It's going to be like right here.
00:57
So that is what this parabola is going to look like.
01:01
And you can simply put into your graphing calculator or a decimal.
01:08
Most application into y1, just put that first graph.
01:13
And then my second function is just linear, and that is going to have a y intercept of 12...