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keky123321

  • 3 years ago

Select one of the factors of 2x^2 + 16x – 18 x + 9 x + 1 x – 2 x – 8

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  1. sauravshakya
    • 3 years ago
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    U know Factor Theorem?

  2. keky123321
    • 3 years ago
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    No I don't.

  3. sauravshakya
    • 3 years ago
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    If a polynomial f(x) is divided by (x-a) then (x-a) is a factor of f(x) if f(a)=0

  4. sauravshakya
    • 3 years ago
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    Does it help?

  5. mayankdevnani
    • 3 years ago
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    so as per factor therom you get x+1.

  6. mayankdevnani
    • 3 years ago
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    right @sauravshakya

  7. sauravshakya
    • 3 years ago
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    Nope... not x+1

  8. sauravshakya
    • 3 years ago
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    It is x+9

  9. keky123321
    • 3 years ago
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    I don't see how the factor theorem can help with this question (x^2 + 7x – 44) though?

  10. sauravshakya
    • 3 years ago
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    Did u get for 2x^2 + 16x – 18

  11. keky123321
    • 3 years ago
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    I got it but i'm not sure exactly how you worked it out i tried and got stuck

  12. sauravshakya
    • 3 years ago
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    f(x)=2x^2+16x-18 Now, U need to try for every options for which u will get f(a)=0 when it is divided by (x-a)

  13. sauravshakya
    • 3 years ago
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    In this case, When f(x) is divided by (x+9), f(-9)=2*(-9)^2+16*(-9)-18=0

  14. sauravshakya
    • 3 years ago
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    So, one of the factor of f(x) is (x+9)

  15. keky123321
    • 3 years ago
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    OK that makes sense.

  16. sauravshakya
    • 3 years ago
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    Now, can u do these type of problems?

  17. keky123321
    • 3 years ago
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    I think so thank you.

  18. sauravshakya
    • 3 years ago
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    welcome

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