anonymous
  • anonymous
by using the discriminant, determine the value for k such that the equation will have exactly one root.
Mathematics
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
\[2x ^{2}-kx+3=0\]
amistre64
  • amistre64
when k = 0 id assume :)
amistre64
  • amistre64
wrong "k" lol sorry

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anonymous
  • anonymous
you want the discriminant equal to 0
amistre64
  • amistre64
k^2 -4ac = 0 k^2 -4(2)(3) = k^2 - 24
anonymous
  • anonymous
ha I supose. I know the answer is k= +/-2 (root6) I just dont know how they got it.
amistre64
  • amistre64
k = +- sqrt(24) k = +- sqrt(4*6) k = +- 2sqrt(6)
anonymous
  • anonymous
ohh I see! THanks

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