anonymous
  • anonymous
Determine whether the following has a maximum or minimum value and then compute that value: y = 2x2 + 10x - 4
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
is that 2 times 2 or no
anonymous
  • anonymous
do you have any answer choices
anonymous
  • anonymous
yeah but i found it i need help with this one Determine the quadratic equation for the parabola: range: {y:y ≤ 9}; x-intercepts: -2 and 4

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anonymous
  • anonymous
have you already tackled derivatives?
anonymous
  • anonymous
no im taking online classes so some of the stuff i dont know
anonymous
  • anonymous
lol same here wait a few ill get you an answer
anonymous
  • anonymous
ah ok
anonymous
  • anonymous
thankyouuuu
anonymous
  • anonymous
ok here's a review. to find the maximum and minimums of the value of a function, what we commonly do is we first find the critical points
anonymous
  • anonymous
now what are critical points? these are points where the derivative of the function of f'(x)=0
anonymous
  • anonymous
so suppose if we have any constant c and I plug this in to f'(x) and get 0 or if f'(c)=0 then the function will have a critical point at x=c
anonymous
  • anonymous
wow im stumped lol heressometimes try to put you question in google or yahoo to get a
anonymous
  • anonymous
fasster answer
anonymous
  • anonymous
now this critical point could either be a minimum point or a maximum point
anonymous
  • anonymous
k cuase this seems to complicated
anonymous
  • anonymous
ok ok :)) I'll make it simplier then
anonymous
  • anonymous
lol when everyone confuses me i just look on google and yahoo for the answer lol
anonymous
  • anonymous
first find f'(x)
anonymous
  • anonymous
here we have f'(x)=4x+10
anonymous
  • anonymous
yeah they got this site called expert.com and it has alot of answers you just type in the proplem
anonymous
  • anonymous
haha that even confuses me hey anony try my question lol
anonymous
  • anonymous
If you know the x intercepts of the "equation" you can reason towards the form asked for.
anonymous
  • anonymous
ok ok :))
anonymous
  • anonymous
For example, you know that x=-2 will make f(x)=0, that is f(-2)=0
anonymous
  • anonymous
btw it has a minimum which is at point x=-5/2
anonymous
  • anonymous
Moreover, you know that x=4 will make the function attain a 0value. f(4)=0
anonymous
  • anonymous
This leads to the equation: (x-4)*(x+2), the 2 factors are the "roots" of the equation - where the value of the function is 0.
anonymous
  • anonymous
Which results in x^2+2x-4x-8 --> f(x)=y=x^2-2x-8

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