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anonymous

  • one year ago

Given a polynomial f(x), if (x + 5) is a factor, what else must be true?

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  1. anonymous
    • one year ago
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    @ganeshie8 @Abhisar @dan815 @Abb0t

  2. anonymous
    • one year ago
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    @peachpi

  3. DanJS
    • one year ago
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    zeroes of the polynomial

  4. anonymous
    • one year ago
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    A.f(0) = 5 B. f(0) = −5 c. f(5) = 0 d. f(−5) = 0

  5. DanJS
    • one year ago
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    If x-5 factors out of the thing, then you have f(x) = (x-5)(something left) if x-5=0 then....

  6. DanJS
    • one year ago
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    Sorry it is f(x) = (x+5)(something else) Put in X= -5 f(-5) = 0*(Something) = 0

  7. anonymous
    • one year ago
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    Is it A?

  8. DanJS
    • one year ago
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    If (x+5) is a factor, then if you let X=-5 , that factor will be zero, and multiply the rest of the function by zero f(-5) = ...

  9. anonymous
    • one year ago
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    oh lol it's D!!

  10. anonymous
    • one year ago
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    0

  11. DanJS
    • one year ago
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    right, you see

  12. anonymous
    • one year ago
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    so it is D?

  13. DanJS
    • one year ago
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    Right, Say the function is f(x) = (x+5)(x^3+6x-4) The x+5 is factored out of the thing... if that quantity is zero, (when x=-5 , f(x)=f(-5) then the function will also be zero at that location

  14. anonymous
    • one year ago
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    If x = 1 is a zero of the polynomial function f(x) = 3x3 − 8x2 + 3x + 2, which of the following is another zero of f(x)?

  15. DanJS
    • one year ago
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    If x=1 is a zero, then you can probably say (x-1) will be a factor of f(x)

  16. anonymous
    • one year ago
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    So would it be -1?

  17. DanJS
    • one year ago
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    no, that means you can say f(x) = (x-1)*(another factor)

  18. DanJS
    • one year ago
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    When "another factor" = 0 , that will be you other zero(s)

  19. DanJS
    • one year ago
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    The zeroes are where y=f(x) = 0, crosses x axis

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  20. anonymous
    • one year ago
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    @DanJS so it is 2?

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