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17-09-2018
Mathematics

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Find all zeros for 9x^3-33x^2-54x-30

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lesliekolleroxrkcf lesliekolleroxrkcf

17-09-2018

9x³-33x²-54x-30 =
3(3x³-11x²-18x-10) =
3(x-5)(3x²+4x+2) so one zero is 5. use the quadratic formula to determine the other 2 roots are a double root at -⅔

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