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7 October, 02:41

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

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  1. 7 October, 04:45
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    x² - 18x - 4 = ox² - 18x = 4x² - 18x + (18/2) ² = 4 + (18/2) ²x² - 18x + 81
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