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the local maximum is when the rate of change between x and y is 0|dw:1358379289305:dw|

the rate of change between x and y is found by taking the derivative

then you can find where the maximum and minimum are by solving
\[\frac{ dy }{ dx } = 0\]

im sorry but im still confused x.x what would i plug into that formula? ^-^;

Do you know how to find the derivative of the formula in the question?

no :(

is this homework? what topic are you doing at the moment?

its a segment review for my exam x.x and its pre-calc

i switched schools so some of the stuff i dont know x.x

have a look on google for an instruction book for your calc

okay:/ thanks though <3

copy this formula
((x^5)/4) + (x^2) - 4x
its your one but arranged in a way this calc likes it

and paste it after y1 =
then press graph

thanks!(:

:)