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

1 Answer

2 votes
x² - 18x - 4 = ox² - 18x = 4x² - 18x + (18/2)² = 4 + (18/2)²x² - 18x + 81

answered
User Dhaval
by
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