anonymous
  • anonymous
Find the x-intercepts and intervals in the equation y=-x^4-5x^3+3x^2+13x=10
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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welshfella
  • welshfella
should that be + 10 at the end?
anonymous
  • anonymous
-10.
welshfella
  • welshfella
ok

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welshfella
  • welshfella
the by rational root theorem the roots could be +/- 1, +/-2, +/- 5 +/- 10 evaluate f(1)
welshfella
  • welshfella
does it = 0? if so you have one of the zeros ( intercepts on x-axis)
anonymous
  • anonymous
i got -5, -2 and 1.
welshfella
  • welshfella
good job
anonymous
  • anonymous
now, what is the interval?
welshfella
  • welshfella
now there must be another root because the function is of the 4th segree
welshfella
  • welshfella
* degree
anonymous
  • anonymous
when use the synthetic division, i got -x+1
welshfella
  • welshfella
it wiil be worth drawing the graph on Desmos one of the roots could have duplicity 2
welshfella
  • welshfella
x = 1 has duplicity 2
anonymous
  • anonymous
so, in giving the intervals, should i disregard the another 1?
welshfella
  • welshfella
gtg right now sorry one of the other guys will be able to help

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