Posted by Rose on Saturday, March 13, 2010 at 7:36pm.
use the factor theorem to determine whether xc is a factor of f(x)
f(x)=x^3+8x^218x+20; x10
I have a doubt in my answer, i determined that x10 is not a factor... am i right? please verify as my exam is tomorrow night at college. thank you for your time and hard work:)

Using the factor Theorem  MathMate, Saturday, March 13, 2010 at 7:52pm
It can be shown that x10 is not a factor of x^3+8x^218x+20. So your are correct.
If you wish, you could try (x+10) and show that it is a factor of x^3+8x^218x+20.

Using the factor Theorem  Rose, Saturday, March 13, 2010 at 7:58pm
thank you so much dear mate, yes i took your advise and indeed i got it as a factor:) thank you.

Using the factor Theorem  MathMate, Saturday, March 13, 2010 at 8:20pm
You're welcome!
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