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What is the factor of the polynomial expression x3 plus 5x2 plus 3x plus 15?
Wiki User
∙ 8y ago
The factors are : (x² + 3) and (x + 5). Here's how I got that:
I plotted it and found it crosses the x-axis at x = -5. Substituting x = -5 verifies that -5 is a root. So one of the factors is (x + 5).
Using long division: (x³ + 5x² + 3x + 15)/(x+5) = x² + 3.
Wiki User
∙ 12y ago
Wiki User
∙ 8y ago(x + 5)(x^2 + 3)
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(5x + 2)(x + 1)
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