We have the following function that is a
quadratic function:![y=-x+x^2](https://img.qammunity.org/2019/formulas/mathematics/college/kau5topg5iirgjjpmp5c1t58ctz0hpa0uv.png)
So the graph of this function is shown in the figure below. This is a
parabola as you can see. The roots of this functions, that is, the x-intercepts are:
![y=-x+x^2 \\ y=x(x-1) \\ \\ x_(1)=0 \ and \ x_(2)=1](https://img.qammunity.org/2019/formulas/mathematics/college/mytpcknljc8l0wtgk2cpg3gdaskwilottp.png)
As you can see in the figure. This function decreases from
![(-\infty,0.5)](https://img.qammunity.org/2019/formulas/mathematics/college/l2nyvt7293490zhgsmzmsswsgao5blnne7.png)
and increases from
![(0.5, \infty)](https://img.qammunity.org/2019/formulas/mathematics/college/2457e0jffbqs22hymf1unpvzf8o8tzuwb6.png)
Finally, another thing we can see from the graph is that the vertex is the point:
![V(0.5,-0.25)](https://img.qammunity.org/2019/formulas/mathematics/college/xpbt6zktru366dgo1ee0kx6ec4oq50ju3g.png)