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ahoymewmew

  • 3 years ago

for this x2 - 12x + 27 how do you know if its (x+3) or (x-3) the plus and minus confuse me :s

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  1. RaphaelFilgueiras
    • 3 years ago
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    x1.x2=27 x1+x2=12

  2. RaphaelFilgueiras
    • 3 years ago
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    so x1=3 and x2=9

  3. RaphaelFilgueiras
    • 3 years ago
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    when you made x=x1or x2 you must get a zero

  4. RaphaelFilgueiras
    • 3 years ago
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    so p(x)=(x-x1).(x-x2)

  5. ahoymewmew
    • 3 years ago
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    @RaphaelFilgueiras (x + 3) (x + 9) (x – 3) prime these are the choices it gave me.

  6. RaphaelFilgueiras
    • 3 years ago
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    so p(x)=(x-3).(x-9)

  7. ahoymewmew
    • 3 years ago
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    ok thanks c: @RaphaelFilgueiras

  8. RaphaelFilgueiras
    • 3 years ago
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    you are welcome

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