anonymous
  • anonymous
if f(x)=x^1/2-x and g(x)=2x^3-x^1/2, find f(x)-g(x)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
i would really appreciate it if someone would actually help me this time!...
anonymous
  • anonymous
ok ill help u
anonymous
  • anonymous
thank you somuch!

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More answers

anonymous
  • anonymous
this would be your equation (x^1/2-x)-(2x^3-x^12)
anonymous
  • anonymous
Answers are: -2x^3-2x-2x^1/2 -2x^3-2x 2x^3-2x+2x^1/2 -2x^3+2x^1/2
anonymous
  • anonymous
okay... my is like my worst subject so, could you explain how to do that? please
anonymous
  • anonymous
math*
anonymous
  • anonymous
is this what the problem looks like?
1 Attachment
anonymous
  • anonymous
yes
anonymous
  • anonymous
ok thanks
anonymous
  • anonymous
no problem
anonymous
  • anonymous
??...
anonymous
  • anonymous
umm hmm this one is tough
anonymous
  • anonymous
yeah ik DX
FireKat97
  • FireKat97
you know that we can write x^1/2 as √x right?
anonymous
  • anonymous
i didnt know that
FireKat97
  • FireKat97
well you should try and remember that its pretty useful :)
FireKat97
  • FireKat97
so if we have f(x) - g(x) we can write this as (√x - x) - (2x^3 - √x)
FireKat97
  • FireKat97
do you know how you would simplify - (2x^3 - √x)?
anonymous
  • anonymous
thank you so much, math is my worst subject but im almost done with the class. thanks for helping!! (:
anonymous
  • anonymous
let me try, but most likely no
anonymous
  • anonymous
nope i dont
FireKat97
  • FireKat97
okay so imagine there is a 1 after the - sign so you have to simplify -1(2x^3 - √x) do you know the FOIL method?
anonymous
  • anonymous
i forgot it havent done it in a while
anonymous
  • anonymous
is it -2x^3+2x^1/2
anonymous
  • anonymous
?
FireKat97
  • FireKat97
yup! thats correct!
anonymous
  • anonymous
omg thanks so much!!
anonymous
  • anonymous
would you mind helping me out i have three more questions left?
FireKat97
  • FireKat97
so now we have x^1/2 - x - 2x^3 + x^1/2 and we want to simplify this by collecting like terms
FireKat97
  • FireKat97
were nearlyyyy finished with this question ahahha
anonymous
  • anonymous
oh haha i thought we were alredy done lol i already went on to the next question
FireKat97
  • FireKat97
lol dw we're close
anonymous
  • anonymous
can we skip that one ?
anonymous
  • anonymous
A machine is set up to cut metal strips of varying lengths and widths based on the time (t) in minutes. The change in length is given by the function l(t)=t^2 - sq. root of t, and the change in width is given by w(t)=t^2 - 2t 1/2. Which function gives the change in area of the metal strips?
FireKat97
  • FireKat97
okay do you know formula for the area of a rectangle?
anonymous
  • anonymous
a=wl
anonymous
  • anonymous
Answers: a(t)=t^4+2t a(t)=t^4+2t+3t^5/2 a(t)=t^4-3t^5/2+2t a(t)=t^4+2t-2t^1/2+square root of t
FireKat97
  • FireKat97
yup so we want to do l(t) x w(t) do you see why?
anonymous
  • anonymous
not really
anonymous
  • anonymous
wait yes i do

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