if f(x)=25-x^2 and g(x)=5-x, what is the rule for the function (f-g)(x)?
The rule for (f-g)(x) is always the same: (f-g)(x) = f(x) - g(x)
So what's hard here?
f-g = 25-x^2 - (5-x) = 25 -x^2 - 5 + x = 20 + x - x^2
So what's hard here?
f-g = 25-x^2 - (5-x) = 25 -x^2 - 5 + x = 20 + x - x^2