The answer is -8. hope i helped
Answer:

Step-by-step explanation:
All you do is distribute the first parentheses into the second.
I am not sure but I can give you an app called photo math and they would answer your question. Hope that helped:))
you'll first need to understand the symbols, I've attched a cheat sheet :)
you'll need to see if AB is linked to CD reversed.
If not then it's not A
For B you'll have to see if the angles are parralel to each other.
and for C you'll have to see if the angles are the same.
and D is the same as C
so the answer is ab=cd
<h2>now you understand :)</h2>