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noseboy908

  • one year ago

Need help factoring a few denominators. (Link to screenshot below)

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  1. noseboy908
    • one year ago
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    https://goo.gl/Nn9ip6

  2. tkhunny
    • one year ago
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    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.

  3. noseboy908
    • one year ago
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    How do those apply to the first denominator? It falls under neither category, as I can understand what you're saying.

  4. freckles
    • one year ago
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    difference of squares is the suggestion he made for the first denominator

  5. freckles
    • one year ago
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    \[x^2-4 \text{ notice this can be written as } x^2-2^2\] try to use the last formula he wrote to factor this

  6. noseboy908
    • one year ago
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    Ah, yes, so it'd become (x-2)(x+2).

  7. freckles
    • one year ago
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    correct

  8. noseboy908
    • one year ago
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    Alright then, thank you @freckles and @tkhunny.

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