Answer:
g(f(4)) = -3
Step-by-step explanation:
f(x)=x-7
g(x) = x
g(f(4))
f(4) = 4-7
f(4) = -3
g(-3) = -3
Part A is accomplished by first factoring out the b^2 to get
. Factor that completely using the quadratic formula to get
. Part B is done entirely with the quadratic formula (only cuz that's the easiest way to factor a second degree polynomial!) to get (x-9)(x-9) or (x-9) multiplicity 2. Part C is done by taking roots. Keep in mind that since this is a second degree polynomial you will have 2 solutions.
, therefore,
and
which is +11 and -11. And you're done! Factoring is very important...make sure you learn it and learn it well!!!
Answer:
-1.7x-3
Step-by-step explanation: