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anonymous

  • 4 years ago

Use synthetic substitution to evaluate P(x) = x3 + 3x2 - 6 for x = 5. P(5) =

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  1. ash2326
    • 4 years ago
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    airricuhh why don't you try this one? if you get stuck I'll help you

  2. anonymous
    • 4 years ago
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    so you start at 5 3 3 6 and then i don't know what comes under that..

  3. anonymous
    • 4 years ago
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    goes"

  4. ash2326
    • 4 years ago
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    Let me teach you,

  5. anonymous
    • 4 years ago
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    \[5^3+3(5^2)-6=194\]

  6. anonymous
    • 4 years ago
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    got it?

  7. anonymous
    • 4 years ago
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    no i don't saljudieh,

  8. ash2326
    • 4 years ago
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    we have x=5, it means we are dividing by x-5 to get the value of P(5) write the coefficients of P(x)= x^3+3x^2-6 coefficients are 1 3 -6

  9. ash2326
    • 4 years ago
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    got till here?

  10. anonymous
    • 4 years ago
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    where did you get the 1 coefficient from? the x right?

  11. ash2326
    • 4 years ago
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    yeah x^3 = 1 3x^2= 3 -6 as it is

  12. anonymous
    • 4 years ago
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    okay, so where do you get the numbers that go under neath,

  13. ash2326
    • 4 years ago
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    now we are using synthetic division first step write this way _______________ 5 | 1 3 -6

  14. anonymous
    • 4 years ago
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    wait ash, i messed up the problem was Use synthetic substitution to evaluate P(x) = x3 + 3x2 - 6 for x = -1. P(-1) =

  15. ash2326
    • 4 years ago
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    now we have _______________ 5 | 1 3 -6 bring the first term 1 as it is down , _______________ 5 | 1 3 -6 1 next multiply , the term brought down by 5 and ____________________________ 5 | 1 3 -6 5(5*1) 1

  16. anonymous
    • 4 years ago
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    :/ im sorry, so it would be _______________ -1 | 1 3 -6

  17. ash2326
    • 4 years ago
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    no we have to evaluate at x=5 so it's _______________ 5 | 1 3 -6

  18. anonymous
    • 4 years ago
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    i know but i typo'd the problem its P(-1) :/

  19. anonymous
    • 4 years ago
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    so it would be 3 5 which is 15 so then would i divide 15 by -6 and get the answer?

  20. anonymous
    • 4 years ago
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    hey arricuhh u wanna learn? watch thishttp: http://www.youtube.com/watch?v=-aTMzg4syy8

  21. anonymous
    • 4 years ago
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    well thanks.

  22. anonymous
    • 4 years ago
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    did it help?

  23. anonymous
    • 4 years ago
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    so is the answer -8 ?

  24. anonymous
    • 4 years ago
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    nope, it did help. but i still got the wrong answer.

  25. anonymous
    • 4 years ago
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    wait is it -5?

  26. anonymous
    • 4 years ago
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    |dw:1328504343410:dw| ok look at this:

  27. anonymous
    • 4 years ago
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    \[x^3+3x^2(no x so you PUT ZERO) -6\]you were messing a term of zero instead of the x term.. coz you had

  28. anonymous
    • 4 years ago
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    saljudieh07 i messed up tho and the question is Use synthetic substitution to evaluate P(x) = x3 + 3x2 - 6 for x = -1. P(-1) = i accidently put 5. im going to try it again because i forgot the 0.

  29. anonymous
    • 4 years ago
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    yeh whe you have the zero it will work

  30. anonymous
    • 4 years ago
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    gdluck i g2g for now byee

  31. anonymous
    • 4 years ago
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    okay thank you! (:

  32. nenadmatematika
    • 4 years ago
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    is that really you on the picture?

  33. anonymous
    • 4 years ago
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    yea,

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