If f(x)=4-x2 and g(x) =6x, which is the value of (g-f)(3) ? (g-f)(3)=

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.