GlenBMarchi
GlenBMarchi GlenBMarchi
  • 20-02-2016
  • Mathematics
contestada

Factor z^3 - 2z^2 + 9z - 18

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Ilie
Ilie Ilie
  • 20-02-2016
z³ - 2z² + 9z - 18=z²(z-2)+9(z-2)=(z-2)(z²+9).
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TSO
TSO TSO
  • 20-02-2016
[tex]z^3 - 2z^2 + 9z - 18 = (z^3 - 2z^2 )(+ 9z - 18 )=z^2 (z-2)+9 (z-2) \\ \\ =\boxed {\bf {(z^2+9)(z-2)=(z-3i)(z+3i)(z-2)}}[/tex]
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