Sagot :
solution:
Let f and g be defined as f(x) = x-5 and g(x) = x²-1.
Then, we find f-g.
So, we have:
(f - g)(x) = f(x) - g(x)
f(x) - g(x) = (x-5) - (x² - 1)
f(x) - g(x) = -x² +1 +x - 5
Thus, we obtain,
f(x) - g(x) = -x² +x - 4
solution:
Let f and g be defined as f(x) = x-5 and g(x) = x²-1.
Then, we find f-g.
So, we have:
(f - g)(x) = f(x) - g(x)
f(x) - g(x) = (x-5) - (x² - 1)
f(x) - g(x) = -x² +1 +x - 5
Thus, we obtain,
f(x) - g(x) = -x² +x - 4