Example

Adding 3d+xd\frac{3}{d} + \frac{x}{d}

To add the rational expressions 3d\frac{3}{d} and xd\frac{x}{d}, combine their numerators over the common denominator. Since both expressions share the denominator dd, the sum is written as 3+xd\frac{3 + x}{d}.

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Updated 2026-04-29

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Ch.5 Polynomials and Polynomial Functions - Intermediate Algebra @ OpenStax

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