Answer:
[tex]1.\ x=\dfrac{7}{2}\\\\2.\ x=3\\\\3.\ x=-1[/tex]
Step-by-step explanation:
[tex]\text{If}\ x_1\ \text{and}\ x_2\ \text{are the x - intercepts, then the axis of symmetry}\\\text{of aa parabola is}\ x=\dfrac{x_1+x_2}{2}.[/tex]
[tex]Graph\ \#1:\\\\x-intercepts: x_1=2\ and\ x_2=5.\ Substitute:\\\\x=\dfrac{2+5}{2}=\dfrac{7}{2}\\\\Graph\ \#2:\\\\x-intercepts:\ x_1=1\ and\ x_2=5.\ Substitute:\\\\x=\dfrac{1+5}{2}=\dfrac{6}{2}=3\\\\Graph\ \#3:\\\\x-intercepts:\ x_1=-2\ and\ x_2=0.\ Substitute:\\\\x=\dfrac{-2+0}{2}=\dfrac{-2}{2}=-1[/tex]
