\bold{(x+2)}

\bold{(x-2)}

\bold{(x+2)(x-2)}

a = Segment((-10, 1), (2, 1))
a_1 = Segment((2, 1), (10, 1))
a_2 = Segment((-10, 2), (-2, 2))
a_3 = Segment((-2, 2), (10, 2))
a_5 = Segment((-10, 3), (-2, 3))
a_6 = Segment((-2, 3), (2, 3))
a_8 = Segment((2, 3), (10, 3))