Answer:
-12
Step-by-step explanation:
-8-4=-12
because -×-=+
and -+-=-
why because when you add the highest number gives you the sign
Answer:
8
Step-by-step explanation:
*whispers* (there is a calculator online for that.)
Also the formula is a² + b² = c².
Answer:
No. See below.
Step-by-step explanation:

Use the following formula (Difference of Two Squares)


We are not done yet. As we can still factor the expression which is x²-1 by using the same formula.

This is the fully factored form.
Answer:
its 12 i think because if A D is 5 E B looks about double that so i think its 12
Step-by-step explanation: