anonymous
  • anonymous
write x^2 - 9 / x (x^3 - 4x / x^2 +5x +6) in simplest form.
Mathematics
schrodinger
  • schrodinger
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myininaya
  • myininaya
\[\frac{x^2-9}{x} \frac{x^3-4x}{x^2+5x+6}\] is that the question?
anonymous
  • anonymous
yeah pretty much. because the question is asking to find the area of the rectangle. |dw:1327020602568:dw|
anonymous
  • anonymous
in simplest form

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myininaya
  • myininaya
have you factor all four of those polynomials?
anonymous
  • anonymous
ohs. yeah that's what i was doing. but i keep getting and doing it wrong
myininaya
  • myininaya
\[\frac{(x-3)(x+3)}{x} \frac{x(x^2-4)}{(x+2)(x+3)}\]
myininaya
  • myininaya
did you get that far?
anonymous
  • anonymous
yeah i got to that part.
myininaya
  • myininaya
ok also x^2-4 is factorable
myininaya
  • myininaya
\[\frac{(x-3)(x+3)}{x} \frac{x(x-2)(x+2)}{(x+2)(x+3)}\]
anonymous
  • anonymous
ohhh ! okay i didn't do that part.
myininaya
  • myininaya
now you have somethings to cancel, right?
anonymous
  • anonymous
yep (x+3) and the (x+2) and the x ?
myininaya
  • myininaya
\[\frac{(x-3) \not{(x+3)} }{ \not{x}} \frac{ \not{x} (x-2) \not{(x+2)}}{\not{(x+2)} \not{(x+3)}}\]
myininaya
  • myininaya
i couldn't get the lines to go over the whole part
myininaya
  • myininaya
so you have (x-3)(x-2) left right?
anonymous
  • anonymous
yep so then the answer would be x^2- 5x +6
anonymous
  • anonymous
OHHHH ! now i get it :) thank you !

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