Question

Given the function f(x) = x² + 4x - 1, find the maximum or minimum value. Then state whether it is a maximum or minimum value. A (-2, 5); maximum B (-2, 5); minimum C (-2, -5); maximum D (-2, -5); minimum

Answer 1

Answer:

D (-2, -5); minimum

Step-by-step explanation:

hello :

f(x) = x² + 4x - 1  = (x²+4x+4) - 5

f(x) = (x+2)² - 5.....( vertex form )

a(x-h)²+k    when a = 1   h=-2 and  k= -5

the vertex is : (-2 ;-5)    a positif

conclusion :   D (-2, -5); minimum