It wouldn't let me post, so I screenshotted:
That equal 1 because they are the same
A figure formed by 3 segments connecting 3 non-colinear points
First simplify inside parenthasees
8-6x+12
-6x+8+12
-6x+20
distributive poproty
a(b+c)=ab+ac
1/4(-6x+20)=-6x/4+20/4=
-3/2x+5