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math0101

  • 3 years ago

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

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  1. robinfr93
    • 3 years ago
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    answer should be 10??? O_O

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

  3. Callisto
    • 3 years ago
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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?

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

  5. math0101
    • 3 years ago
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    Aha, got it! Thanks

  6. Callisto
    • 3 years ago
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    Welcome :)

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