Algebra- Maximum and minimum.
posted by Niki on .
I don't understand how to find the maximum and minimum.
Determine whether the given quadratic function has a minimum value or maximum value. Then find the coordinates of the minimum or maximum point.
15.f(x) = -x2 + 2x - 4
20.f(x) = 2x2 - 4x
19.f(x) = x2 - 2x + 1
30.f(x) = -3x2 - 3x
#15 and #30 open downwards, so they have a maximum
#20 and #19 open upwards, so they have a minimum.
change the equations to the form
f(x) = a(x-h)^2 + k by completing the square
You should have learned how to do this, and read the vertex from that form.
what are the maximum value and minimum value of (x)=12sin(2x-2pi/3)-5l+3
2x2- 16x+4= i do not know
Find the minimum and maximum possible areas of a rectangle measuring 2 km by 5 km.