Answer:
-4
Step-by-step explanation:
3 + - 7
When you these signs together, + and -, or - and +, whatever order it is it remains the same
+ and - always becomes negative
Here you have 3 + - 7
The +- becomes negative (-)
You end up with 3 - 7, or -7 + 3, as the 3 is positive
-7 + 3 = -4
Perfect-square trinomials are of the form:
and are expressed in squared-binomial form as: 
The only possible choice for squared-binomial form is
Answer: correct choice is A.
Answer: #2 CD=CA
Step-by-step explanation:
So sorry if wrong but i think it may be right.
GOOD LUCK!!
