SOLUTION: Let f (x) = x2 + 18x + 84. (a) Find the vertex. Answer: ________ (b) State the range of the function. Answer: ________ (c) On what interval is the function decreasing? Answer:__

Algebra ->  Functions -> SOLUTION: Let f (x) = x2 + 18x + 84. (a) Find the vertex. Answer: ________ (b) State the range of the function. Answer: ________ (c) On what interval is the function decreasing? Answer:__      Log On


   



Question 1040498: Let f (x) = x2 + 18x + 84.
(a) Find the vertex. Answer: ________
(b) State the range of the function. Answer: ________
(c) On what interval is the function decreasing? Answer:______

Answer by ikleyn(52803) About Me  (Show Source):
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Let f (x) = x2 + 18x + 84.
(a) Find the vertex. Answer: ________x=-9, y=3
(b) State the range of the function. Answer: ________ [3,infinity)
(c) On what interval is the function decreasing? Answer:______ (-infinity,-9].