16 minus what gives you -2

According to the question: 16-?=-2

Lets take the unknown value as 'x'

So, 16-x=-2

=  -x=-2-16

=  -x= -18

And now if we cancel the negative signs it will be, x= 18

Thus, we should subtract 18 from 16 to get -2

answer

the correct answer is

explanation

the given function is

the excluded values are obtained by solving:

we factor to obtain:

the excluded values are