So when do we have the same y value? Or another way to think about it is when does this thing equal four? So if we set them equal to each other, we have negative x squared plus six x minus one is equal to four. This will give us the x values where these two lines intersect. And so we will get, if we wanna solve for x, we can subtract four from both sides. Negative x squared plus six x minus five is equal to zero. We can multiply both sides by negative one.