We have the following function given:
f(x) = x^2 +4x- 5
g(x) = 7x^2 -6x
And we want to find g-f, so we can do the following:
g-f = 7x^2 -6x -(x^2 +4x-5)
And if we distribute the terms we have this:
g-f = (7x^2 -x^2) -(6x +4x) -5
g-f = 6x^2 -10x +5
So then the best option for this case would be:
Option1