Could someone help me find the minima and maxima of three polynomials?
(Medal and fan!)

1. 0.5x^4 - 4x^2 + 4
2. x^3 - 1.5x^2 - 6x + 1
3. 0.75x^4 + x^3 - 3x^2 + 4

Question

Could someone help me find the minima and maxima of three polynomials? 
(Medal and fan!)

1. 0.5x^4 - 4x^2 + 4
2. x^3 - 1.5x^2 - 6x + 1
3. 0.75x^4 + x^3 - 3x^2 + 4

anonymous · Answer

is this algebra ? we can do it

anonymous · Answer

the first one has no max, since it is a parabola that opens up

anonymous · Answer

do you get to use calculus?

anonymous · Answer

i dont think so

anonymous · Answer

damn i am not sure how to do it without calc, thought i could but i could not
do you get to use technology?  finding the minimum is a calculus problem

anonymous · Answer

the calc way is to take the derivative and find the critical points, but if you are not in calc class then i guess you cannot take the derivative

anonymous · Answer

we get to use a graphing calculator at school but im home and i dont have one here

anonymous · Answer

lol

anonymous · Answer

you are on a computer right?

anonymous · Answer

yes

anonymous · Answer

here i just did the first one in two second by copying and pasting what you wrote in to wolframalfpha http://www.wolframalpha.com/input/?i=0.5x^4+-+4x^2+%2B+4

anonymous · Answer

on a computer you have unlimited graphing calculators
i happen to like that one because besides the graph, it actually tells you what the minimum is

anonymous · Answer

scroll down you see the minimum is $-4$ at $x=2$ and $x=-2$

anonymous · Answer

thanks :)