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math0101 Group Title

What am I doing wrong here? (5x^2 - 5) / (x - 1) = 5x(x - 1) / (x - 1) = 5x The answer should be 5(1 + 1)

  • 2 years ago
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  1. robinfr93 Group Title
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    answer should be 10??? O_O

    • 2 years ago
  2. math0101 Group Title
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    5(x+1) Sorry, typo!

    • 2 years ago
  3. Callisto Group Title
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    (5x^2 - 5) / (x - 1) = 5(x + 1) / (x - 1) ________ The underlined part is wrong. 5x^2-5 Take out the common factor 5 => 5 (x^2 -1) Factor (x^2-1) using the identity \(a^2-b^2 = (a+b)(a-b)\) Can you try it again?

    • 2 years ago
  4. Callisto Group Title
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    Oops sorry! The underlined part should be 5(x-1)

    • 2 years ago
  5. math0101 Group Title
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    Aha, got it! Thanks

    • 2 years ago
  6. Callisto Group Title
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    Welcome :)

    • 2 years ago
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