anonymous
  • anonymous
find all real zeros f(x)=2x^4+3x^3-6x^2-6x+4
Mathematics
chestercat
  • chestercat
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anonymous
  • anonymous
anyone there
zzr0ck3r
  • zzr0ck3r
algebraically?
anonymous
  • anonymous
no

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anonymous
  • anonymous
using synthetic division
zzr0ck3r
  • zzr0ck3r
ahh word. Ill watch to learn:)
anonymous
  • anonymous
you know how/
zzr0ck3r
  • zzr0ck3r
well we know, all non real roots come in tandem. that's all I can help:)
anonymous
  • anonymous
iopus?
lopus
  • lopus
|dw:1348011701036:dw| this is ruffinni
anonymous
  • anonymous
thank you so much
anonymous
  • anonymous
then i have to put it in a quadratic equation
lopus
  • lopus
|dw:1348012143081:dw|
anonymous
  • anonymous
wow ok i understand thanks a bunch
lopus
  • lopus
you understand ruffinni? x=-2 x=1/2 x=... x=..
anonymous
  • anonymous
ruffinni? never heard of it.. but i know how u got it now
lopus
  • lopus
ruffini is synthetic division you can finish this. lets go!
anonymous
  • anonymous
ok hold on
anonymous
  • anonymous
how is there 2 more x's
lopus
  • lopus
|dw:1348012608903:dw|
anonymous
  • anonymous
so + or - square root of 2 is one x too and that leaves one more?
lopus
  • lopus
|dw:1348012735984:dw|
anonymous
  • anonymous
so the x's are x= +square root of 2 x= -square root of 2 x= 1/2 x=-2
lopus
  • lopus
yes
anonymous
  • anonymous
thank you so much

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