anonymous
  • anonymous
Using the functions f(x) = 2x + 7, g(x) = x2 - 4, and h(x) = 5x. Find all of the following. Make sure your answer is in simplest form. c. f(g(x)) d. g(x)h(x) e. g(x) / f(x)
Mathematics
jamiebookeater
  • jamiebookeater
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triciaal
  • triciaal
c use g(x) as your x in f(x) d g(x) multiplied by h(x) e g(x) divided by f(x)
triciaal
  • triciaal
let me know where you get stuck
anonymous
  • anonymous
c. 2(x^2 - 4) + 7 d.10x^2-20x e. im not sure how to do that? are the other 2 correct?

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triciaal
  • triciaal
c. need to simplify expand the parenthesis and group like terms
triciaal
  • triciaal
|dw:1438912339436:dw|
anonymous
  • anonymous
would c be 2x^3+7x^2-8x-28?
anonymous
  • anonymous
d. 10x^3-20x ?
anonymous
  • anonymous
or c would be 2x^3+7x^2-8x-21
triciaal
  • triciaal
|dw:1438912488114:dw|
triciaal
  • triciaal
for d you do not have 2x it is x^2 that 2 is a power means x multiplied by x
anonymous
  • anonymous
d. 5x^3-20x ?
triciaal
  • triciaal
|dw:1438912652000:dw|
triciaal
  • triciaal
d yes
anonymous
  • anonymous
would e just be (x2-4)/(2x+7) ? or can that be simplified
triciaal
  • triciaal
I think we should leave it like
anonymous
  • anonymous
thank you so much for your help
triciaal
  • triciaal
you are welcome

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