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anonymous

  • one year ago

Help with algebra!!! Will medal

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  1. anonymous
    • one year ago
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    What are the roots of the equation 5x2 - 5x - 30 = 0?

  2. anonymous
    • one year ago
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    A. x = -3/5 or 10 B. x = 3/5 or -10 C. x = 2 or 3 D. -2 or 3

  3. kropot72
    • one year ago
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    The first step is to take out the common factor 5, giving: \[\large x^{2}-x-6=0\]

  4. kropot72
    • one year ago
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    Can you factorize that?

  5. anonymous
    • one year ago
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    5(x^2 - x - 6) = 0 Right?

  6. kropot72
    • one year ago
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    Not really. Now divide both sides by 5, to get the quadratic that i posted.

  7. anonymous
    • one year ago
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    I don't understand. Why do I have to divide both sides by 5?

  8. kropot72
    • one year ago
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    To make the original quadratic much simpler to factorize. \[\large x^{2}-x-6=(x+?)(x-?)\]

  9. anonymous
    • one year ago
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    (x + 2)(x - 3) ?

  10. kropot72
    • one year ago
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    Correct. Now can you see the roots?

  11. anonymous
    • one year ago
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    yes. Thank you so much. Now I finally understand. :)

  12. kropot72
    • one year ago
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    You're welcome :)

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