You are asked to find the minimum or maximum of the quadratic function: f(x) = -2x^2 + 4x + 1 and you use x =
-b/2a to find the x-value.
1. What is b?
2. What is a?
3. What is the value of x?
4. What is the value of y?
5. Is this a minimum or maximum?
a. 4
b. 3
c. -1
d. 3
e. Maximum
f. 2
g. -2
h. 9
i. 1
j. Minimum
k. -4
1. What is b?
b = 4
2. What is a?
a = -2
3. What is the value of x?
x = -b/2a = -4 / 2*(-2) = -4 / -4 = 1
4. What is the value of y?
y = -2(1)^2 + 4(1) + 1 = -2 + 4 + 1 = 3
5. Is this a minimum or maximum?
It is a maximum
Therefore, the answers are:
1. b = a. 4
2. a = g. -2
3. x = i. 1
4. y = h. 9
5. Maximum = e. Maximum