Example

Factoring 432c3+686d3432c^3 + 686d^3

To factor 432c3+686d3432c^3 + 686d^3, first identify and factor out the greatest common factor (GCF). Since both coefficients are even, factor out 22 to get 2(216c3+343d3)2(216c^3 + 343d^3). The binomial inside the parentheses is a sum of cubes, with 216c3=(6c)3216c^3 = (6c)^3 and 343d3=(7d)3343d^3 = (7d)^3. Use the sum of cubes formula a3+b3=(a+b)(a2ab+b2)a^3 + b^3 = (a + b)(a^2 - ab + b^2) to write (6c+7d)((6c)2(6c)(7d)+(7d)2)(6c + 7d)((6c)^2 - (6c)(7d) + (7d)^2). After simplifying the terms, the completely factored expression is 2(6c+7d)(36c242cd+49d2)2(6c + 7d)(36c^2 - 42cd + 49d^2).

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Updated 2026-04-30

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