What is the range of the function f(x)=x2−x−2?
1 Answer
Aug 31, 2017
Explanation:
complete the square on f(x)
f(x)=x2−2(12)x+14−14−2
f(x)=(x−12)2−94
for all x,(x−12)2≥0
the minimum value of f(x) is therefore −94
⇒range is [−94,+∞)
graph{x^2-x-2 [-10, 10, -5, 5]}