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anonymous

  • one year ago

Medal for best explaination how to do this. Which of the following constants can be added to x2 - 6x to form a perfect square trinomial? a.)6 b.)9 c.)36

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  1. anonymous
    • one year ago
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    @freckles

  2. anonymous
    • one year ago
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    @alexistheking777

  3. anonymous
    • one year ago
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    |dw:1438190133320:dw|

  4. anonymous
    • one year ago
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    Divide -6 by 2.

  5. anonymous
    • one year ago
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    -3

  6. anonymous
    • one year ago
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    Good. Now square it.

  7. anonymous
    • one year ago
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    9

  8. anonymous
    • one year ago
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    That's it. :)

  9. anonymous
    • one year ago
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    so why would i divide by 2? bc the square?

  10. anonymous
    • one year ago
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    Well, you must add the square of half of coefficient of x, so the trinomial will be squared.

  11. anonymous
    • one year ago
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    hm, okay

  12. anonymous
    • one year ago
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    thanks

  13. anonymous
    • one year ago
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    No problem.

  14. anonymous
    • one year ago
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    about to post 1 more

  15. skullpatrol
    • one year ago
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    A perfect square trinomial has the form $$a^2 -2ab + b^2$$

  16. skullpatrol
    • one year ago
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    $$x^2 -6x =x^2 -2•3x$$

  17. skullpatrol
    • one year ago
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    Therefore b = 3.

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spraguer (Moderator)
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