Answer:
C. 5
Step-by-step explanation:
2 - 5 + 4 - 6 - 2 + 12
2 + 4 + 12 - 5 - 6 - 2
18 - 5 - 6 - 2
18 - 13
5
Answer: 0.1 or 
Step-by-step explanation:

= 
Answer:
( y^2 +1) ( x^2+1)
Step-by-step explanation:
Step 1 ) Factor out x^2 from the expression
x^2 (y^2+1)+y^2+1
Step 2) Factor out y^2 from the expression
(y^2+1) (x^2+1)
Solution is ( y^2 +1) ( x^2+1)