noseboy908
  • noseboy908
Need help factoring a few denominators. (Link to screenshot below)
Mathematics
katieb
  • katieb
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noseboy908
  • noseboy908
https://goo.gl/Nn9ip6
tkhunny
  • tkhunny
You should not be struggling with the application of the Distributive Property. a(b+c) = ab + ac With only two terms, this is very commonly the case. x^2 + 3x = x(x+3) -- Done. You will have to memorize a few patterns. One of the most important is a "Difference of Squared" (a^2 - b^2) = (a+b)(a-b) That is all you need for those denominators.
noseboy908
  • noseboy908
How do those apply to the first denominator? It falls under neither category, as I can understand what you're saying.

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freckles
  • freckles
difference of squares is the suggestion he made for the first denominator
freckles
  • freckles
\[x^2-4 \text{ notice this can be written as } x^2-2^2\] try to use the last formula he wrote to factor this
noseboy908
  • noseboy908
Ah, yes, so it'd become (x-2)(x+2).
freckles
  • freckles
correct
noseboy908
  • noseboy908
Alright then, thank you @freckles and @tkhunny.

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