anonymous
  • anonymous
x cubed over x squared - 4 divided by x cubed - 9x squared over x squared + 7x -18
Mathematics
jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
could someone help me get started please
amistre64
  • amistre64
its difficult to parse the question; can you rewrite it into something more discernable please?
amistre64
  • amistre64
or use () paranthesis around stuff that is supposed to be grouped together? like perhaps: (x cubed over x squared) - (4 divided by x cubed - 9x) squared over (x squared + 7x) -18

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anonymous
  • anonymous
x cubed over x squared - 4 divided by x cubed - 9x squared over x squared + 7x- 18
anonymous
  • anonymous
x^3/x^2-4/x^3-9x^2/x^2+7x-18
anonymous
  • anonymous
Need to know where parentheses are.
anonymous
  • anonymous
no parentheses
amistre64
  • amistre64
that just leaves order of operations i guess :)
amistre64
  • amistre64
x - (4/x^3) - 9 +7x -18
anonymous
  • anonymous
amistre64
  • amistre64
8x -27 -(4/x^3) 8x^4 -27x^3 -4 ---------------- x^3
anonymous
  • anonymous
- (4/x^3) +8x -27
anonymous
  • anonymous
x squared divided by x cubed - 9x square ___________ _____________________ x squared - 4 x squared + 7x-18
anonymous
  • anonymous
sorry this is the question: x cubed divided by x cubed - 9x squared ___________ ______________________ x squared - 4 x squared +7x - 18
amistre64
  • amistre64
\[\frac{\frac{x^3}{x^2-4}}{\frac{x^3 -9x^2}{x^2 +7x -18}} ???\]
amistre64
  • amistre64
that came out tiny ;)
anonymous
  • anonymous
thats it
amistre64
  • amistre64
factor everything so you know what to cancel out; Also, take the bottom "fraction"; turn it over, spank it, and multiply it to the top "fraction"; like this: xxx (x+9)(x-2) --------- * ---------- (x-2)(x+2) xx (x-9)
amistre64
  • amistre64
Now cancel like terms top tp bottom x(x+9) ---------- (x+2) (x-9)
anonymous
  • anonymous
thank you, I had it right, I really appreciate it.
amistre64
  • amistre64
youre welcome :) its alot easier to solve when you can "read" the problem ;)
anonymous
  • anonymous
are you ready for another one
amistre64
  • amistre64
I spose.... whatcha got?
anonymous
  • anonymous
m squared - n squared -------------------- 5m - n m = - 1/5 and n= 1/5
amistre64
  • amistre64
so you just fill in the variables with the values?
amistre64
  • amistre64
1/25 - 1/25 = 0 0/anything = 0
anonymous
  • anonymous
could someone please help me with factoring

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