wheelerjada13
wheelerjada13 wheelerjada13
  • 19-01-2017
  • Mathematics
contestada

Find only the rational roots of x4 – 9x3 + 16x2 + 18x – 36 = 0

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helper7802
helper7802 helper7802
  • 19-01-2017
x² - 18x - 4 = ox² - 18x = 4x² - 18x + (18/2)² = 4 + (18/2)²x² - 18x + 81
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