Operations with f(x)

[nycmath]

Precalculus
Michael Sullivan
Edition 10
Chapter 3, Section 3.3

Instructions

81.

A. What is the vertex of f?
B. What are the x-intercepts of the graph of f?
C. Solve f(x) = -21 for x. What points are on the graph of f?
D. Use the information obtained in parts A - C to graph
f(x) = x^2 + 4x - 21.