Try 13 and if it’s wrong im sorry
Definition of midpoint.
<K is midpoint for all, hence its reference.
The answer is A.
(a-1)(a-2)
a * a= a^2
a * -2= -2a
a * -1 = -1a = a
-1 * -2 = 2 because two negative signs make a positive.
Put them together:
a^2 - 2a - a + 2
= a^2 - 3a +2
