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What is the root of this polynomial x3 -6x2 plus 4x plus 15?

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Anonymous

∙ 14y ago
Updated: 8/20/2019

x3 - 6x2 + 4x + 15 = (x - 3)(x - (3/2 + √29/2))(x - (3/2 - √29/2))

⇒ roots are x = 3, x = 3/2 + √29/2 (≈ 4.19), or x = 3/2 - √29/2 (≈ -1.19)

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∙ 15y ago
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