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

User Rashidul Islam
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2 Answers

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z³ - 2z² + 9z - 18=z²(z-2)+9(z-2)=(z-2)(z²+9).
User Loneraver
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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)}}
User JARH
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