SOLUTION: Could someone tell me if this is right or not? Indicate whether the graphs of the following will have a maximum or minimum. a) f(x)=8x-3x^2 (is maxi right?) b) f(x)=x^2-9 (ma

Question 204285: Could someone tell me if this is right or not?
Indicate whether the graphs of the following will have a maximum or minimum.
a) f(x)=8x-3x^2 (is maxi right?)
b) f(x)=x^2-9 (maxi?)
c) f(x)=-(3-x)^2 (mini?)
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
Here's something helpful to remember: The polynomial has a minimum when (ie when "a" is positive) or has a maximum when (ie when "a" is negative)

So for all three, simply get the right sides into the form and determine the values of "a". From there, determine if those values are either positive or negative.

Note: you have to FOIL (ie expand) the right side of part c)
RELATED QUESTIONS
Indicate whether the graphs of the following will have a maximum or a minimum. please... (answered by scott8148)

indicate whether the graphs of the following will have a maximum or a minimum. 1. f(x)=x (answered by Born2TeachMath)

can someone please help me? tell whether the relation is a function or not a function. (answered by bucky)

Could someone please tell me if these answers are correct - thanks According to a 2003... (answered by rothauserc)

could someone please tell me the answer to this question? a parabola that opens to the (answered by Theo)

I don't understand the whole area thing. Can someone please help? I'd appreciate it.... (answered by Mathtut)

iam not sure if this is linear and graphs or whatever! because my worksheet is mixed so i (answered by stanbon)

3 points of a triangle are given. Use the points to draw the triangle, then use the slope (answered by richard1234,MathTherapy,ikleyn)

Hi, Could someone please tell me if this would be the right answer? Perform the... (answered by Alan3354)