Which value of a would make the following expression completely factored? x²-a

A.12
B.36
C.49
D.81

The answer is 12.               

12 is not a perfect square like the others.      

the answer is stop cheating on things stoopid

step-by-step explanation:

im eatin up the 44

answer: first option i.e. 'a' is correct.

step-by-step explanation:

since we have given that

number of minutes to wrap a small gift box = 4 minutes

we need to find the number of gifts to be wrapped in 5 minutes

since there is a direct variation, as the number of minutes will increase with   number of gifts to be wrapped.

so, let the number of gifts to be wrapped in 5 minutes be x.

so, it becomes,

hence, first option 'a'   is correct.